Obama to discuss security, Islamic State after California attack

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Obama Says 'We Will Not Be Terrorized' After California Shooting

Dec 6 (Reuters) - President Barack Obama will tell Americans on Sunday what the government is doing to keep them safe following the mass killing by a couple in California last week that is being investigated as an act of terrorism, but no major shift in strategy was expected.

In a rare Oval Office address at 8 p.m. EST (0100 GMT), Obama will lay out the security steps the United States has taken since Islamic State's Nov. 13 assaults in Paris that killed 130 people, as well as since the Sept. 11, 2001, attacks on the United States, an administration official told Reuters.

READ MORE: President Obama to address nation Sunday on terror threat, cancels Kennedy Center Honors appearance

Obama said during a recent visit by French President Francois Hollande to the White House after the Paris attacks that the United States and its coalition would step up efforts to counter Islamic State. He is likely to repeat that message from the Oval Office and, despite Republican criticism that he has not done enough to fight Islamic State, is not expected to unveil a major change in strategy.

Obama also will say he will use "every single aspect of American power" to destroy the militant group, a U.S. official said.

The official said Obama also will give an update on the investigation of U.S.-born Syed Rizwan Farook, 28, and his Pakistani wife, Tashfeen Malik, 29, in the San Bernardino, California, shooting and express confidence that the United States will prevail over terrorist threats.

RELATED GALLERY: Residents mourn in the aftermath of the San Bernadino shootings

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San Bernardino Shooting, People on Scene, Mourning
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Obama to discuss security, Islamic State after California attack
SAN BERNARDINO, CA - DECEMBER 3: A local outreach group prays with residents near the scene of an investigation where two suspects were gunned down during a shootout with police, December 3, 2015 in San Bernardino, California. A day earlier, the two suspects allegedly shot and killed 14 people at the Inland Regional Center in San Bernardino. (Photo by Gina Ferazzi/Los Angeles Times via Getty Images)
SAN BERNARDINO, CA - DECEMBER 3: Redondo Police Officer Dan Richey carries a bouquet of flowers to deliver to a female shooting victim that grew up in Redondo Beach at the Arrowhead Regional Medical Center on December 3, 2015 in San Bernardino, California.A day earlier, the two suspects allegedly shot and killed 14 people and injured over 20 at the Inland Regional Center in San Bernardino. (Photo by Gina Ferazzi/Los Angeles Times via Getty Images)
SAN BERNARDINO, CA - DECEMBER 03: A mourner cries as she brings flowers to a road block outside of the Inland Regional Center on December 3, 2015 in San Bernardino, California. Police continue to investigate a mass shooting at the Center that left at least 14 people dead and another 17 injured. (Photo by Justin Sullivan/Getty Images)
A woman identified as the fiancée of shooting victim (C-purple) is comforted by friends and Chaplain Steve Ballinger (L) as she leaves flowers on December 3, 2015, near the site of a mass shooting at the Inland Regional Center where 14 people were killed on December 2 in San Bernardino, California. Ballinger said the woman's fiancé died in the attack. AFP PHOTO/PATRICK T. FALLON / AFP / Patrick T. Fallon (Photo credit should read PATRICK T. FALLON/AFP/Getty Images)
SAN BERNARDINO, CA - DECEMBER 3: Larry Jones, pastor of Cross over Outreach Church, Dr. Jeannetta Million, pastor of Victoria's Believers Church, and Arnold Morales, pastor of King of Glory Church bow their heads in prayers for the victims and those involved in the mass shootings at the Inland Regional Center, during a prayer vigil at Orange Show Road and Waterman Avenue December 3, 2015 in San Bernardino, California. Investigators are looking for a motive as to why Syed Rizwan Farook and Tashfeen Malik went on a shooting rampage that left 14 dead and at least 17 others wounded. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
SAN BERNARDINO, CA - DECEMBER 3: Local resident Katrina Venegas is close to tears as she has been kept away from her home which is directly in front of shooting scene where 2 suspects were gunned down driving a black SUV during a shootout with police on San Bernardino Avenue the day after the suspects allegedly shot and killed 14 people at the Inland Regional Center on December 3, 2015 in San Bernardino, California. She said her dog has been locked in the house alone since yesterday. (Photo by Gina Ferazzi/Los Angeles Times via Getty Images)
SAN BERNARDINO, CA - DECEMBER 3: San Bernardino resident Lisa Gonzalez hugs Pastor Ernie Ceballos after he was helpful in getting the police to escort her back to her home on the same street where sheriff deputies investigate the scene where 2 suspects were gunned down during a shootout with police on San Bernardino Avenue the day after the suspects allegedly shot and killed 14 people at the Inland Regional Center on December 3, 2015 in San Bernardino, California. Gonzalez had left home briefly yesterday to go buy milk for her twin 3-year-olds. The shooting took place in front of her house while she was gone. She and her son, Santana Gonzalez,left, were not allowed back to their home so they spent the night in a hotel. Her husband was home with the children and wasn't allowed to leave the home. (Photo by Gina Ferazzi/Los Angeles Times via Getty Images)
People wait at a community center for a family member who was near a shooting that killed multiple people at a social services center, Wednesday, Dec. 2, 2015, in San Bernardino, Calif. (AP Photo/Jae C. Hong)
Jesus Gonzales, center left, who has been separated with his wife since Wednesday's shooting, is comforted by local church members including Jose Gomez, center right, Thursday, Dec. 3, 2015, in San Bernardino, Calif. Gonzales has been unable to get to his home due to a police shootout with suspects which took place in his neighborhood. (AP Photo/Jae C. Hong)
A group of local church members pray for residents who live in the neighborhood where Wednesday's police shootout with suspects took place, Thursday, Dec. 3, 2015, in San Bernardino, Calif. Multiple attackers opened fire on a banquet at a social services center for the disabled in San Bernardino on Wednesday, killing multiple people and sending police on a manhunt for suspects.(AP Photo/Jae C. Hong)
SAN BERNARDINA, CA - DECEMBER 2: Olivia Navarro waits to see her daughter after a mass shooting at the Inland Regional Center on December 2, 2105 in San Bernardino, California. Multiple fatalities and injuries were reported as police search for up to three suspects who are still at-large. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
A woman, center, who survived a shooting rampage, talks to members of the media outside a community center after she reunited with her parents Wednesday, Dec. 2, 2015, in San Bernardino, Calif. Multiple attackers opened fire on a banquet at a social services center for the disabled in San Bernardino on Wednesday, killing multiple people and sending police on a manhunt for suspects. (AP Photo/Jae C. Hong)
SAN BERNARDINO, CA - DECEMBER 03: A group of men embrace in prayer outside the crime scene where the suspects in the shooting at the Inland Resource Center were killed on December 3, 2015 in San Bernardino, California. Police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 17 injured. (Photo by Sean M. Haffey/Getty Images)
SAN BERNARDINO, CA - DECEMBER 02: Mayor of San Bernadino, California R. Carey Davis pauses during a press conference at City Hall regarding the shooting that took place inside the Inland Regional Center on December 2, 2015 in San Bernardino, California. Police continue to investigate the shooting that left at least 14 people dead and another 17 injured. (Photo by Sean M. Haffey/Getty Images)
A woman who declined to give her name kisses her sister, center, a survivor of a shooting rampage that killed multiple people and wounded others as they reunite at a community center in San Bernardino, Calif., Wednesday, Dec. 2, 2015. (AP Photo/Jae C. Hong)
A man hugs a person who was near a shooting rampage at a social services center that killed multiple people and wounded others, Wednesday, Dec. 2, 2015, at a community center where family members gathered to pick up the survivors in San Bernardino, Calif. (AP Photo/Jae C. Hong)
SAN BERNARDINO, CA - DECEMBER 02: Mayor of San Bernadino, California R. Carey Davis speaks during a press conference at City Hall regarding the shooting that took place inside the Inland Regional Center on December 2, 2015 in San Bernardino, California.Police continue to investigate the shooting that left at least 14 people dead and another 17 injured. (Photo by Sean M. Haffey/Getty Images)
Omar Riopedre embraces his wife Diana, who was in the Inland Regional Center when the mass shootings took place, as they leave the Rudy C. Hernandez Community Center in the San Bernardino on December 2, 2015. A man and a woman suspected of carrying out a deadly shooting at a center for the disabled in California were killed in a shootout with police, while a third person was detained, police said. AFP PHOTO / FREDERIC J. BROWN / AFP / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
David Bowditch, assistant director in charge of the FBI LA field office, talks to the media near the the site of a mass shooting on Wednesday, Dec. 2, 2015 in San Bernardino, Calif. One or more gunmen opened fire Wednesday at a Southern California social services center, shooting several people as others locked themselves in their offices, desperately waiting to be rescued by police, witnesses and authorities said. Authorities said the shooting rampage killed multiple people and wounded others. (AP Photo/Chris Carlson)
San Bernardino Police Chief Jarrod Burguan, right, talks to the media near the the site of a mass shooting on Wednesday, Dec. 2, 2015, in San Bernardino, Calif. One or more gunmen opened fire Wednesday at a Southern California social services center, shooting several people as others locked themselves in their offices, desperately waiting to be rescued by police, witnesses and authorities said. Authorities said the shooting rampage killed multiple people and wounded others. (AP Photo/Chris Carlson)
People who were near a deadly shooting at a social services center that killed multiple people arrive at at a community center in San Bernardino, Calif., Wednesday, Dec. 2, 2015. (AP Photo/Jae C. Hong)
SAN BERNARDINA, CA - DECEMBER 2: Luis Gutierrez gets emotional as he talks about his wife after a mass shooting at the Inland Regional Center on December 2, 2105 in San Bernardino, California. Multiple fatalities and injuries were reported as police search for up to three suspects who are still at-large. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
SAN BERNARDINO, CA - DECEMBER 2: Marie Cabrera, Sonya Gonzalez and Christine Duran, all of San Bernardino, pray after a mass shooting at the Inland Regional Center on December 2, 2105 in San Bernardino, California. Multiple fatalities and injuries were reported as police search for up to three suspects who are still at-large. (Photo by Rick Loomis/Los Angeles Times via Getty Images)
People evacuated from the Inland Regional Center walk from busses into The Rock Church and World Outreach Center during the aftermath of a mass shooting at the facility on December 2, 2015 in San Bernardino, California. One or more gunmen opened fire inside a center for the disabled in killing at least 14 people and wounding the same number before fleeing the scene, officials said. AFP PHOTO / PATRICK T. FALLON / AFP / Patrick T. Fallon (Photo credit should read PATRICK T. FALLON/AFP/Getty Images)
A woman wipes her tears at a community center where family members are gathering to pick up survivors after a shooting rampage that killed multiple people and wounded others at a social services center in San Bernardino, Calif., Wednesday, Dec. 2, 2015. (AP Photo/Jae C. Hong)
Teresa Hernandez, facing camera, is comforted by a woman as she arrives at a social services center in San Bernardino, Calif., where one or more gunmen opened fire, shooting multiple people on Wednesday, Dec. 2, 2015. (AP Photo/Jae C. Hong)
SAN BERNARDINO, CA - DECEMBER 2: Employees and other people are evacuated by bus from the site of a mass shooting at the Inland Regional Center December 2, 2015 in San Bernardino, California. Multiple fatalities were reported as police search for up to 3 suspects who are still at large. (Photo by David McNew/Getty Images)
Two women embrace at a community center where family members are gathering to pick up survivors after a shooting rampage that killed multiple people and wounded others at a social services center in San Bernardino, Calif., Wednesday, Dec. 2, 2015. (AP Photo/Jae C. Hong)
SAN BERNARDINO, CA - DECEMBER 2: Employees and other people are evacuated by bus from the site of a mass shooting at the Inland Regional Center December 2, 2015 in San Bernardino, California. Multiple fatalities were reported as police search for up to three suspects who are still at large. (Photo by David McNew/Getty Images)
SAN BERNARDINO, CA - DECEMBER 2: Employees and other people are evacuated by bus from the site of a mass shooting at the Inland Regional Center December 2, 2015 in San Bernardino, California. Multiple fatalities were reported as police search for up to three suspects who are still at large. (Photo by David McNew/Getty Images)
Police escort civilians away from the 1300 block of S. Waterman Street near the site of a shooting took place on December 2, 2015 in San Bernardino, California. One or more gunman opened fire inside a building in San Bernardino in California, with reports of 20 victims at a center that provides services for the disabled. Police were still hunting for the shooter, saying one to three possible suspects were involved. Heavily armed SWAT teams, firefighters and ambulances swarmed the scene, located about an hour east of Los Angeles, as police warned residents away. AFP PHOTO / FREDERIC J. BROWN / AFP / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
Survivors are evacuated from the scene of a shooting on December 2, 2015 in San Bernardino, California. One or more gunman opened fire inside a building in San Bernardino in California, with reports of 20 victims at a center that provides services for the disabled. Police were still hunting for the shooter, saying one to three possible suspects were involved. Heavily armed SWAT teams, firefighters and ambulances swarmed the scene, located about an hour east of Los Angeles, as police warned residents away. AFP PHOTO / FREDERIC J. BROWN / AFP / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
Survivors are evacuated from the scene of a shooting under police and sheriff's escort on December 2, 2015 in San Bernadino, California. One or more gunman opened fire inside a building in San Bernardino in California, with reports of 20 victims at a center that provides services for the disabled. Police were still hunting for the shooter, saying one to three possible suspects were involved. Heavily armed SWAT teams, firefighters and ambulances swarmed the scene, located about an hour east of Los Angeles, as police warned residents away. AFP PHOTO / FREDERIC J. BROWN / AFP / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
SAN BERNARDINO, CA - DECEMBER 2, 2015: Evacuated workers pray in a circle on the San Bernardino Golf Course across the street where a mass shooting occurred at the Inland Regional Center on December 2, 2105 in San Bernardino, California. Multiple fatalities and injuries were reported as police search for up to three suspects who are still at large. (Photo by Gina Ferazzi / Los Angeles Times via Getty Images)
Two women comfort each other near the scene of a shooting outside a Southern California social services center in San Bernardino, Calif., where one or more gunmen opened fire, shooting multiple people on Wednesday, Dec. 2, 2015. (KNBC via AP)
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Another senior U.S. government source told Reuters that investigators are trying to determine if Malik, who Farook brought to the United States on a fiancee visa in 2014, had radicalized her husband's Muslim faith and what sort of contacts she had with Islamic militants in Saudi Arabia and Pakistan, where she went to pharmacy school.

The couple had four guns, some 6,000 rounds of ammunition and a dozen pipe bombs either with them or at their rented townhouse in Redlands. The source said investigators are becoming increasingly convinced they were planning multiple attacks but are unsure of the targets.

U.S. Homeland Security Secretary Jeh Johnson told the New York Times the Obama administration was rethinking its approach to domestic terror because of the San Bernardino assault. He said the United States should beef up airline security by increasing the number of agents in overseas airports, bolstering standards for visa-waiver programs and improving communications between officials and Muslim communities to help locate threats.

U.S. Attorney General Loretta Lynch, appearing on NBC's "Meet the Press" show, said Obama may call for congressional action.


Watch: U.S. Attorney General Loretta Lynch on "Meet the Press"

Loretta Lynch: Obama Will Call On Congress to Take Action


The San Bernardino attack could give Obama momentum with Congress, which has not granted his February request for formal authorization of the use of military force against Islamic State. Republicans say it is too limited in scope to defeat Islamic State while some liberal Democrats have opposed it as too open-ended.

White House officials say Obama has the power as commander in chief to press the fight against Islamic State even without the formal congressional authorization but wants buy-in from lawmakers to demonstrate a unified front.

STILL SEEKING MOTIVE

Lynch said the Federal Bureau of Investigation is focusing on what led Farook and Malik to open fire at a holiday party with Farook's co-workers in San Bernardino on Wednesday.

Fourteen people died and 21 were wounded before police killed Farook and Malik in a street shootout a few hours later. Federal officials said the attack was an act of terrorism and are trying to determine any links to Islamic State.

Lynch said investigators had conducted 300 interviews and searched several sites related to last week's attack. Neither Farook nor Malik was on the list of 900 U.S. residents under FBI investigation for suspected ties to Islamic extremist groups.

"I can't say definitively right now what led either of these two people to pick up guns and become murderers," Lynch said. "We're looking at everything we can find out about these two killers' lives - how they grew up, where they grew up, how they met.

"These two individuals - self-radicalized, radicalized by others - that's what we definitely want to learn so we can figure out how to best prevent this again."

SEE ALSO: Tashfeen Malik, mom in California rampage, became very devout

Facebook confirmed that comments praising Islamic State were posted about the time of the shooting to an account set up by Malik under an alias. Islamic State said on Saturday the couple were among its followers.

Even before San Bernardino, concerns about the United States as a terror target were elevated by the Islamic State attacks in Paris and plans to admit 10,000 refugees from Syria's civil war.

Lynch said Obama's address to the nation would focus on what the federal government has done to ensure the safety of Americans and call on them ""not give into fear at this time."

The San Bernardino attacks will add to the debate on how much power law enforcement and intelligence agencies need to ensure safety from extremists. Complaints about the intrusiveness of the National Security Administration led a week ago to the shutting down of its daily vacuuming of millions of Americans' phone records.

RELATED GALLERY: See photos from inside the San Bernardino shooting suspects' home

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Inside San Bernardino shooting suspects home
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Obama to discuss security, Islamic State after California attack
REDLANDS, CA - DECEMBER 4: Inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly the recent mass shootings, lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A Quran sits in the living room inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: An identification card for Syed Farook inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A hole in the ceiling could be seen inside the closet area of the rear bedroom inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A baby crib is seen inside the baby room of the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings, lived, on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A firearm lubricant could be seen in the closet of the front bedroom inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: Media reporters go in and out of the townhouse where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A praying mat and a cleared out closet in the baby room in the front of the apartment. A rare first glimpse inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly the recent mass shootings, lived, on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: Prayer beads are seen laying on the bed alongside personal documents in the rear bedroom inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A closet inside the baby room. A rare first glimpse inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings, lived, on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
REDLANDS, CA - DECEMBER 4: A rare first glimpse inside the house where Syed Rizwan Farook and Tafsheen Malik, suspects of the deadly recent mass shootings, lived on December 4, 2015 in Redlands, California. (Photo by Marcus Yam/Los Angeles Times via Getty Images)
A book sits on a table inside the home of San Bernardino mass murder suspect Syed Farook, December 4, 2015 in Redlands, California. The community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. AFP PHOTO / ROBYN BECK / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
Journalists squeeze into a child's bedroom in the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. AFP PHOTO / ROBYN BECK / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
A view of the kitchen inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. AFP PHOTO / ROBYN BECK / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
A television crew prepares to do a live report inside a child's bedroom in the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. AFP PHOTO / ROBYN BECK / AFP / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
SAN BERNARDINO, CA - DECEMBER 04: Reporters take pictures of photographs found inside the home of shooting suspect Syed Farook on December 4, 2015 in San Bernardino, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: Baby food sits on a kitchen counter inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: A hatchet sits in a kitchen drawer inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: Reporters inspect the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: Arabic books sit in a closet inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: An Islamic Manners book sits in a bedroom inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: A book about prayer sits on a bedside table inside the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
SAN BERNARDINO, CA - DECEMBER 04: Reporters inspect the home of shooting suspect Syed Farook on December 4, 2015 in San Bernardino, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: Reporters inspect the home of shooting suspect Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
REDLANDS, CA - DECEMBER 04: Reporters inspect the home of Syed Farook on December 4, 2015 in Redlands, California. The San Bernardino community is mourning as police continue to investigate a mass shooting at the Inland Regional Center in San Bernardino that left at least 14 people dead and another 21 injured. (Photo by Justin Sullivan/Getty Images)
Members of the media crowd into the apartment bedroom of San Bernardino shooting suspects Syed Farook and his wife, Tashfeen Malik, in Redlands, Calif., Friday, Dec. 4, 2015, after the building landlord invited journalists into the townhouse. A book containing passages from the Quran is seen at right. (AP Photo/Chris Carlson)
Members of the media crowd into a child's room in an apartment in Redlands, Calif., shared by San Bernardino shooting rampage suspects Syed Farook and his wife, Tashfeen Malik, Friday, Dec. 4, 2015, after the building landlord invited media into the townhouse rented by the California attackers. (AP Photo/Chris Carlson)
Members of the media crowd into the living room of an apartment in Redlands, Calif., shared by San Bernardino shooting rampage suspects Syed Farook and his wife, Tashfeen Malik, Friday, Dec. 4, 2015, after the building landlord invited media into the townhouse rented by the California attackers. (AP Photo/Chris Carlson)
Members of the media crowd into the living room of an apartment in Redlands, Calif., shared by San Bernardino shooting rampage suspects Syed Farook and his wife, Tashfeen Malik, Friday, Dec. 4, 2015, after the building landlord invited media into the townhouse rented by the California attackers. (AP Photo/Chris Carlson)
Members of the media crowd into a child's room in an apartment in Redlands, Calif., shared by San Bernardino shooting rampage suspects Syed Farook and his wife, Tashfeen Malik, Friday, Dec. 4, 2015, after the building landlord invited media into the townhouse rented by the California attackers. (AP Photo/Chris Carlson)
A member of the media films a wall tapestry displaying religous writing in the living room of an apartment in Redlands, Calif., shared by San Bernardino shooting rampage suspects Syed Farook and his wife, Tashfeen Malik, Friday, Dec. 4, 2015, after the building landlord invited media into the townhouse rented by the California attackers. (AP Photo/Chris Carlson)
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Democratic presidential candidate Hillary Clinton, who served as Obama's secretary of state, said she expected the president to announce a new approach to Islamic State that would be "an intensification of the existing strategy," which focuses on coalition air strikes.

Republican presidential candidates demanded tighter security standards to fight terror with Senator Lindsey Graham of South Carolina, who is near the bottom of polls in the field, said Islamic State was planning a "9-11 style attack" on the United States.

"It is a matter of time (until) we get hit by ISIL. Not some lone wolf attack but hardened terrorists are coming here to hit us hard if we don't hit them first," he said on "Meet the Press."

WATCH: Sen. Lindsey Graham on 'Meet the Press'

Graham: 9/11 Style ISIS Attack Coming to America

Republican presidential candidate Ted Cruz said if he is elected in November 2016, the U.S. approach to Islamic State should be to "carpet bomb them into oblivion."

(Additional reporting by Doina Chiacu, Diane Bartz, Alana Wise; Writing by Bill Trott; Editing by Mary Milliken and Jonathan Oatis)

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