Support for death penalty drops to lowest level in 4 decades

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Support for the death penalty for convicted murderers is the lowest it's been since President Richard Nixon was in office, according to a new report from the Pew Research Center.

Just under half of Americans - 49 percent - favor the death penalty for those convicted of murder, while 42 percent oppose it. Support has dropped 7 percent since March 2015. Support for capital punishment peaked in the mid-1990s, when 80 percent of people were in favor and only 16 percent opposed it. The study was conducted from Aug. 23 to Sept. 2 among 1,201 adults.

SEE ALSO: Pope Francis advises US voters to 'choose in conscience'

Opposition hasn't been this high since 1972, the same year the Supreme Court ruled the death penalty unconstitutional in the landmark Furman v. Georgia decision. The decision voided about 40 death penalty statutes, but allowed states to rewrite their capital punishment laws to eliminate the issues brought up in the case. The Supreme Court reinstated the death penalty in 1976. The number of executions in the U.S. has steadily declined since 2009, from 52 to 15 so far this year.

In a more detailed report from 2015, Americans expressed doubts on whether the death penalty was applied morally and whether it risked putting innocent people to death.

More on the death penalty in the U.S.

12 PHOTOS
Controversial Death Penalty Cases
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Controversial Death Penalty Cases
Dave Atwood, left, and Sophia Malik, right, both of Houston, hold photos of Napoleon Beazley as they protest his execution Tuesday, May 28, 2002, in Huntsville, Texas. Beazley, 25, was executed by lethal injection for the 1994 carjacking murder of 63-year-old John E. Luttig of Tyler, Texas. It was the 14th execution this year in Texas. (AP Photo/Brett Coomer)
Rena, left, and Ireland Beazley hold a photo of their son Napoleon Beazley at their home in Grapeland, Texas, Friday, May 31, 2002. Napoleon Beazley's death sentence for killing the father of a federal judge during a 1994 carjacking at age 17 stirred national debate over capital punishment for youths. (AP Photo/Donna McWilliam)
Rena Beazley, left, and her husband, Ireland, from Grapeland, Texas, are shown in the audience during a news conference Thursday, May 23, 2002, in Austin, Texas. The two, parents of Texas death row inmate Napoleon Beazley, and clergy pleaded for his sentence to be commuted to life in prison. He is scheduled to be executed by lethal injection Tuesday. (AP Photo/Harry Cabluck)

Mugshot of Cameron Todd Willingham

(Photo credit: Texas Department of Criminal Justice)

Judy Cavnar, of Ardmore, Okla., a cousin of executed Texas prison inmate Cameron Todd Willingham, displays a picture of him during a news conference Tuesday, May 2, 2006, in Austin, Texas. The case of a Willingham, who maintained his innocence until the end but was executed after he was convicted of an arson murder, is going before a new state commission required to look into allegations of forensic misconduct. (AP Photo/Harry Cabluck)
Eugenia Willingham of Ardmore, Okla., right, wipes a tear as she speaks during a news conference Tuesday, May 2, 2006, in Austin, Texas. Willingham and other relatives of Cameron Todd Willingham recounted the final moments of Willingham's life and their unsuccessful attempts to block his execution. The New York-based Innocence Project submitted the case to the Texas Forensic Science Commission on Tuesday and also asked the panel to review arson convictions statewide. In the background, from left are Willingham's cousins, Pat Cox, and Judy Cavnar. Mrs. Willingham is his stepmother. (AP Photo/Harry Cabluck)
Death row inmate Troy Davis appears in this undated file photo provided by the Georgia Department of Corrections. (Georgia Department of Corrections/MCT via Getty Images)
Demonstrators gather in front of the White House in Washington as they hold a vigil before the scheduled execution of death row inmate Troy Davis, Wednesday, Sept. 21, 2011. Davis is facing lethal injection for killing an off-duty Georgia policeman in Savannah, a crime he and others have insisted for years that he did not commit. (AP Photo/Charles Dharapak)
A man chants during a vigil for Georgia death row inmate Troy Davis In Jackson, Ga., Wednesday, Sept. 21, 2011. Davis is scheduled to die Wednesday for the killing off-duty Savannah officer Mark MacPhail. (AP Photo/John Bazemore)
Anne MacPhail pauses for a moment after learning at 10:55 p.m., on September 21, 2011, that the U.S. Supreme Court had denied a stay of execution for Troy Davis, who was convicted in the 1989 murder of her son Mark MacPhail. Davis was executed shortly after in Jackson, Georgia. (Robin Trimarchi/Columbus Ledger-Enquirer/MCT via Getty Images)

Mugshot of Kelly Renee Gissendaner

(Photo credit: Georgia Department of Corrections)

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Support or opposition to the death penalty doesn't fall along age or educational lines, although according to the poll, younger people with at least some college are more likely to oppose capital punishment.

The discrepancies widen when looking at race and political affiliation. An estimated 55 percent of whites and 72 percent of Republicans favor capital punishment, while only 29 percent of blacks, 36 percent of Hispanics and 34 percent of Democrats support it.

The Supreme Court will hear an appeal this month in the case of Duane Buck, a Texas man convicted of murder in 1997, when public support for the death penalty was at 78 percent. Under Texas law, prosecutors must prove the defendant poses a future danger in order to secure the death penalty. A now-discredited defense expert said the fact that Buck was black increased his future dangerousness. His attorneys argue racial bias played an instrumental role in his sentencing.

17 PHOTOS
Notable death penalty executions and people on death row
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Notable death penalty executions and people on death row
Seated on his bunk in the death cell of Iberia Parish Courthouse, convinced that 'The Lord is Still with Me,' is Willie Francis, a 17-year-old who won a million-to-one chance of a reprieve from death when the electric chair failed to kill him, or even hurt him, at his scheduled execution on May 3. Sentenced to die for the murder of a St. Martinville druggist a year ago, Francis was strapped in the chair. The current was applied. The doomed man squirmed and jumped. But when the current was shut off, he was unharmed. 'It tickled a little,' he said. The state will try again to carry out the execution on Thursday May 9th.

(Bettmann via Getty Images)

This is John Wayne Gacy's police arrest photo from Dec. 21, 1978. Following intensive research, investigation and surveillance, Gacy was arrested by the Des Plaines (Ill.) Police Department on Thursday, Dec. 21, 1978. After being charged with and serving time for 33 murders, Gacy was executed in 1994 by lethal injection. Today, Monday, Nov. 23, 1998, technicians began preliminary work on a possible excavation at an apartment building on Chicago's Northwest Side in search of as many as four more possible victims of the mass murderer. The apartment building at one time, was the home of Gacy's mother, and Gacy had done some construction work there. The information regarding the location was recently released from a retired Chicago police officer who said he had seen Gacy carrying a shovel near the area at about 3 a.m. one day in 1975. The former officer reportedly thought little of the Gacy sighting until three years later, when Gacy was charged with 33 murders. The apartment building is about four miles away from Gacy's house.

(Des Plaines Police Department, Tim Boyle)

A portrait of mass murderer Ted Bundy, responsible for a string of murders in Washington state, Utah, and Florida in the 1970s. He was executed in in Florida on January 24, 1989. His actual victim count remains unknown.

(Bettmann via Getty Images)

Aileen Wuornos is shown in this undated photograph from the Florida Department of Corrections. Wournos was executed by lethal injection October 9, 2002 in Florida for murdering six men when she was a prostitute.

(Photo by Florida DOC/Getty Images)

Admitted mass-slayer Charles Starkweather is shown entering court for the second day of his trial for murder. Starkweather admitted killing 11 people and was executed in Nebraska on June 25, 1959. 

(Bettmann via Getty Images)

Oklahoma City bomber Timothy McVeigh is shown being escorted from the Noble County Courthouse as he is transported to Oklahoma City for arraignment in this April 22, 1995 file photo. On June 11, 2001, McVeigh was executed after being sentenced to death for the bombing of a federal building in Oklahoma City, a crime that took 168 lives and shook a complacent America to the core.

(Jim Bourg / Reuters)

Gary Gilmore, responsible for the shooting deaths of two men, was executed in Utah on January 17, 1977.

(Bettmann via Getty Images)

Media witnesses to the firing squad execution of John Albert Taylor examine the chair in which Taylor sat as he was shot to death at 12:03 a.m. Mountain time January 26 at the Unita State Penitentiary in Utah. The execution of Taylor was the first by firing squad in the United States since the 1977 execution of Gary Gilmore in Utah.

(POOL New / Reuters)

Stanley 'Tookie Williams' was responsible for several murders and other crimes and was executed in California on December 13, 2005. Williams helped found the Crips gang, but was later nominated for the Nobel Peace Prize for his anti-gang efforts. He authored such books as 'Life in Prison,' encouraging kids to stay out of gangs, and his memoir 'Blue Rage, Black Redemption'.'

(Photo by Justin Sullivan/Getty Images)

Teresa Lewis, convicted of murdering her husband and stepson, was executed in Virginia on September 23, 2010. She was the first woman executed in the state in nearly 100 years.

(REUTERS/Virginia Department of Corrections/Handout)

William Bonin (left), a 33-year-old truck driver and registered sex offender, was accused of the 'torture' murders of at least 13 and possibly 21 young males, suspected victims of the so called 'Freeway Killer. He was executed in California on February 23, 1996.

The Los Angeles County Sheriff's Department also said Vernon Butts (right) was an accomplice in at least six of the 21 murders.

(Bettmann via Getty Images)

Dzhokhar Tsarnaev, responsible for Boston Marathon bombing, was sentenced to death on May 15, 2015.

(Photo by VCG Wilson/Corbis via Getty Images)

Major Nidal Malik Hasan, the U.S. Army psychiatrist charged in a mass shooting at the U.S. Army post in Fort Hood, Texas, was sentenced to death on August 28, 2013.

(Ho New / Reuters)

Joseph E. Duncan III, a convicted murderer and sex offender, was sentenced to death on August 27, 2008.

 (Photo provided by Kootenai County Sheriff's Department via Getty Images)

Coy Wesbrook was executed in 2016. He fatally shot five people in 1997 with a hunting rifle in a killing spree launched when he found his ex-wife having sex with other men.

(REUTERS/Texas Department of Criminal Justice/Handout via Reuters)

Dylann Roof, the man convicted of murdering nine worshippers at a historic black church in Charleston was condemned to death by a federal jury on January 10, 2017.

(REUTERS/Charleston County Sheriff's Office/Handout)

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