Barbara Bush: Putin 'the killer' endorsed Trump, and he's 'the worst'

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Barbara Bush Hits Campaign Trail With Jeb in N.H.

Former First Lady Barbara Bush appeared alongside her son and presidential candidate Jeb Bush on CBS "This Morning" on Friday, mocking Russian President Vladimir Putin's positive comments about Donald Trump.

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Jeb Bush, once the presumed front-runner for the Republican nomination for president, has fallen dramatically in the polls over the past several months while Trump has overtaken him and the rest of the field.

On CBS, Jeb Bush vowed to stay in the race even if he loses the New Hampshire primary, which is set to be held next Tuesday.

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Barbara Bush: Putin 'the killer' endorsed Trump, and he's 'the worst'
Republican presidential candidate, former Florida Gov. Jeb Bush speaks at his South Carolina Republican presidential primary rally in Columbia, S.C., Saturday, Feb. 20, 2016. (AP Photo/Matt Rourke)
Republican presidential candidate, former Florida Gov. Jeb Bush during speak a campaign stop Thursday, Feb. 11, 2016, at University of South Carolina campus at Sumter, S.C. (AP Photo/Matt Rourke)
Republican presidential candidate, former Florida Gov. Jeb Bush throws a snowball following a campaign event, Monday, Feb. 8, 2016, in Nashua, N.H. (AP Photo/Steven Senne)
Republican presidential candidate Jeb Bush gestures for people to take their seats as he arrives for a campaign event in Salem, N.H., Sunday Feb. 7, 2016. (AP Photo/Jacquelyn Martin)
NORTH CHARLESTON, SC - JANUARY 15: Former Republican presidential candidate and South Carolina Sen. Lindsey Graham (R) announces his endorsement of Jeb Bush for president on January 15, 2016 in North Charleston, South Carolina. Graham dropped his bid for the presidency last month. (Photo by Scott Olson/Getty Images)
NORTH CHARLESTON, SC - JANUARY 14: Republican presidential candidates (L-R) New Jersey Governor Chris Christie and Jeb Bush laugh during a commercial break during the Fox Business Network Republican presidential debate at the North Charleston Coliseum and Performing Arts Center on January 14, 2016 in North Charleston, South Carolina. The sixth Republican debate is held in two parts, one main debate for the top seven candidates, and another for three other candidates lower in the current polls. (Photo by Scott Olson/Getty Images)
GRINNELL, IA - JANUARY 12: Republican presidential candidate Jeb Bush greets people during a town hall at the Brownell's Firearms Manufacturing company on January 12, 2016 in Grinnell, Iowa. Bush continues his quest to become the Republican presidential nominee. (Photo by Joe Raedle/Getty Images)
HIALEAH, FL - DECEMBER 28: Republican presidential candidate and former Florida Governor Jeb Bush holds a meet and greet at Chico's Restaurant on December 28, 2015 in Hialeah, Florida. Mr. Bush continues to campaign for his parties' nomination as the presidential candidate. Credit: MPI10 / MediaPunch/IPX
Republican presidential candidate, former Florida Gov. Jeb Bush speaks during a Forum Club of the Palm Beaches event, Monday, Dec. 28, 2015, at the Palm Beach County Convention Center in West Palm Beach, Fla. (AP Photo/Terry Renna)
Republican presidential candidate former Florida Gov. Jeb Bush speaks during a campaign stop at the Devine Millimet Law Firm Tuesday, Dec. 8, 2015, in Manchester, N.H. (AP Photo/Jim Cole)
Republican presidential candidate former Florida Gov. Jeb Bush looks on during the singing of the National Anthem before speaking at the Clinton County Republicans Annual Fall Event, Monday, Nov. 30, 2015, in Goose Lake, Iowa. (AP Photo/Charlie Neibergall)
Republican presidential candidate former Florida Gov. Jeb Bush greets audience members after speaking at the Scott County Republican Party's Ronald Reagan Dinner, Tuesday, Oct. 6, 2015, in Davenport, Iowa. (AP Photo/Charlie Neibergall)
WAUKESHA, WI - NOVEMBER 09: Wisconsin Governor Scott Walker (R) sits with Republican presidential candidate Jeb Bush (L) at La Casa de Esperanza during a campaign stop on November 9, 2015 in Waukesha, Wisconsin. Tomorrow Bush will participate in the third Republican presidential debate sponsored by Fox Business News and the Wall Street Journal at the Milwaukee Theater in nearby Milwaukee. (Photo by Scott Olson/Getty Images)
TAMPA, FL - NOVEMBER 2: Republican presidential candidate and former Florida governor Jeb Bush allows a supporter to loosen his necktie during a rally on his 'Jeb Can Fix It' Tour on November 2, 2015 at the Tampa Garden Club in Tampa, Florida. Following dropping poll numbers and poor debate performance Bush is trying to reset his campaign that many say has been flailing. (Photo by Brian Blanco/Getty Images)
Republican presidential candidate former Florida Gov. Jeb Bush stretches before speaking during a campaign stop Wednesday, Sept. 30, 2015, in Bedford, N.H. (AP Photo/Jim Cole)
Republican presidential candidate, former Florida Gov. Jeb Bush, wears custom made boots during a campaign stop with area law enforcement officers, Wednesday, Nov. 4, 2015, in Goffstown, N.H. (AP Photo/Jim Cole)
Republican presidential candidate and former Florida Gov. Jeb Bush poses for a photograph with Katie Wong during a tailgate party before an NCAA college football game between Georgia and South Carolina on Saturday, Sept. 19, 2015, in Athens, Ga. (AP Photo/John Bazemore)
Republican presidential candidate former Florida Gov. Jeb Bush speaks during a town hall meeting at The Music Man Square, Monday, Sept. 21, 2015, in Mason City, Iowa. (AP Photo/Charlie Neibergall)
Republican presidential candidate, former Florida Gov. Jeb Bush gestures and pounds his fist into his hand while speaking at a town hall meeting in Salem, N.H., Thursday, Sept. 10, 2015. (AP Photo/Cheryl Senter)
Republican presidential candidate and former Florida Gov. Jeb Bush shows off a Reagan/Bush '84 T-shirt as he speaks during the opening of his Miami campaign office Saturday, Sept. 12, 2015, in Miami. (AP Photo/Gaston De Cardenas)
Republican presidential candidate, former Florida Gov. Jeb Bush, poses for a selfie with a student during a town hall at La Progresiva Presbyterian School, Tuesday, Sept. 1, 2015, in Miami. (AP Photo/Lynne Sladky)
Republican presidential candidate, former Florida Gov. Jeb Bush, right, talks with students in a third grade class as teacher Judy Elder, left, looks on before a town hall at La Progresiva Presbyterian School, Tuesday, Sept. 1, 2015, in Miami. (AP Photo/Lynne Sladky)
DES MOINES, IA - AUGUST 14: Republican presidential hopeful and former Florida Gov. Jeb Bush (R) and Iowa Gov. Terry Branstad eat a pork chop on a stick at the Iowa Pork Tent during the Iowa State Fair on August 14, 2015 in Des Moines, Iowa. Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage. The State Fair runs through August 23. (Photo by Justin Sullivan/Getty Images)
Republican presidential candidate, former Florida Gov. Jeb Bush, throws a baseball on the midway during a visit to the Iowa State Fair, Friday, Aug. 14, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)
DES MOINES, IA - AUGUST 14: Republican presidential hopeful and former Florida Gov. Jeb Bush (C) talks with members of the media as U.S. Sen. Chuck Grassley (L) (R-IA) and U.S. Sen. Joni Ernst (R) (R-IA) look on during the Iowa State Fair on August 14, 2015 in Des Moines, Iowa. Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage. The State Fair runs through August 23. (Photo by Justin Sullivan/Getty Images)
Republican presidential candidate, former Florida Gov. Jeb Bush, holds up two lobsters during a campaign stop at Brown's Lobster Pound in Seabrook, N.H., Friday, Aug. 7, 2015. At right is owner Bruce Brown. (AP Photo/Charles Krupa)
Republican presidential candidate former Florida Gov. Jeb Bush addresses guests during a town hall style gathering in Gorham, N.H., Thursday, July 23, 2015. (AP Photo/Charles Krupa)
Republican presidential candidate, former Florida Gov. Jeb Bush, speaks at the Florida State University Conference Center in Tallahassee, Fla., Monday, July 20, 2015. (AP Photo/Mark Wallheiser)
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MIAMI, FL - JUNE 15: Former Florida Governor Jeb Bush waves on stage as he announces his candidacy for the Republican presidential nomination during an event at Miami-Dade College - Kendall Campus on June 15 , 2015 in Miami, Florida. Bush joins a list of Republican candidates to announce their plans on running against the Democrats for the White House. (Photo by Joe Raedle/Getty Images)
Republican presidential candidate, former Florida Gov. Jeb Bush talks to members of the media after speaking to voters at the Derry Opera House, Tuesday, June 16, 2015, in Derry, N.H. Bush is campaigning in the nation's earliest presidential primary state. (AP Photo/Jim Cole)
Republican presidential candidate former Florida Gov. Jeb Bush, left, has a selfie taken with a supporter while participating in the Fourth of July Parade festivities in Amherst, N.H.,,Saturday, July 4, 2015. (AP Photo/Cheryl Senter)
Former Florida Gov. Jeb Bush signs autographs from the window of a food truck after he formally announced that he would join the race for president with a speech at Miami Dade College, Monday, June 15, 2015, in Miami. (AP Photo/Wilfredo Lee)
Former Florida Gov. Jeb Bush speaks at a Clark County Republican Party dinner Wednesday, May 13, 2015, in Las Vegas. (AP Photo/John Locher)
A supporter takes a cell phone photo of former Florida Gov. Jeb Bush after a town hall meeting with Puerto Rico's Republican Party in Bayamon, Puerto Rico, Tuesday, April 28, 2015. Immigration is a delicate subject for the 2016 GOP presidential prospect in the primacy race, with several potential rivals favoring a harder line on those who come to the U.S. illegally. But he took it up unapologetically in his remarks. "We're an immigrant nation and we should be proud," he said. (AP Photo/Ricardo Arduengo)
MYRTLE BEACH, SC - MARCH 18: Former Florida Governor and potential Republican presidential candidate Jeb Bush kisses a supporter during an early morning GOP breakfast event on March 18, 2015 in Myrtle Beach, South Carolina. Bush announced in December that he 'actively explore' a presidential run in 2016. He is currently on a two day tour through South Carolina and will attend several fundraising events. (Photo by Richard Ellis/Getty Images)
Former Florida Gov. Jeb Bush waves while being introduced before speaking at the National Automobile Dealers Association convention in San Francisco, Friday, Jan. 23, 2015. (AP Photo/Jeff Chiu)
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"This Morning" co-host Norah O'Donnell brought up an advertisement that's currently running in New Hampshire and has been assailed by Trump. Barbara Bush appeared in the ad to advocate for her son, and Trump mocked it by saying that Jeb "desperately needed mommy to help him."

Barbara then pointed to Putin's apparent endorsement of Trump. Putin said in December that Trump is a "very talented man" who is "an absolute leader of the presidential race." He also welcomed Trump's stated desire to deepen relations with Russia.

"Putin endorsed him, for heaven's sake," Barbara said. "Putin, the killer. Putin, the worst."

Jeb Bush then pointed out then Putin didn't endorse him.

"That's an endorsement you don't want," Barbara said.

Trump has been leading national polls for months, but he lost the Iowa caucuses earlier this week to Sen. Ted Cruz (R-Texas) in a surprise defeat. Jeb Bush came in sixth, netting only 2.8 percent of the vote while he focused more intensely on New Hampshire.

RELATED: See Barbara Bush and George H.W. Bush through the years:

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Barbara and George H.W. Bush through the years
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Barbara Bush: Putin 'the killer' endorsed Trump, and he's 'the worst'
George Bush is shown with wife Barbara in 1945. (AP Photo)
George Herbert Walker Bush poses with his wife Barbara during his campaign for Congress in the 1960's. Born 12 June 1924 in Milton, Massachussetts, George Bush Yale graduated with a degree in Economics in 1948, made a fortune drilling oil before entering politics in 1964. US Congressman from Texas (1966-1970), ambassador to the United nations (1971-1974), Special Envoy to China (1974-1975), Republican National Chairman (1975-1976), Central Intelligence Agency (CIA) director (1976-1977), vice president of the US (1981-1959) George Bush is eventually elected president of the US 08 November 1988 against Democratic nominee Michael Dukakis. AFP PHOTO/WHITE HOUSE (Photo credit should read /AFP/Getty Images)
FILE - In this 1964 file photo, George H.W. Bush sits on couch with his wife Barbara and their children. George W. Bush sits at right behind his mother. Behind couch are Neil and Jeb Bush. Sitting with parents are Dorothy and Marvin Bush. Again? Really? There are more than 300 million people in America, yet the same two families keep popping up when it comes to picking a president. The possibility of a Bush-Clinton matchup in 2016 is increasingly plausible. After months of hints and speculation, former Florida Gov. Jeb Bush last week said he's actively exploring a bid for the Republican nomination. And while Hillary Rodham Clinton hasn't revealed her intentions, she's seen as the odds-on favorite for the Democratic nomination. By Nancy Benac. ? (AP Photo, File)
Republican Senatorial candidate George Bush shows a victory sign as he and his wife Barbara stand in front of a vote machine November 3, 1964 in Houston,Tex., just before casting their ballot. The candidate waited an hour and a half in a long of votes that circled the Pilgrim Elementary School where the Bush's voted this morning. in Houston. (AP Photo).
George Herbert Walker Bush poses with his wife Barbara in Beijing in 1974. Born 12 June 1924 in Milton, Massachussetts, George Bush Yale graduated with a degree in Economics in 1948, made a fortune drilling oil before entering politics in 1964. US Congressman from Texas (1966-1970), ambassador to the United nations (1971-1974), Special Envoy to China (1974-1975), Republican National Chairman (1975-1976), Central Intelligence Agency (CIA) director (1976-1977), vice president of the US (1981-1959) George Bush is eventually elected president of the US 08 November 1988 against Democratic nominee Michael Dukakis. AFP PHOTO/WHITE HOUSE (Photo credit should read /AFP/Getty Images)
LANGLEY. -- JAN. 26: President Gerald R. Ford and Barbara Bush watch as Justice Potter Stewart swears in George H.W. Bush as the new Director of the CIA, at CIA HQ in Langley, Virginia, January 26, 1976. The outgoing Director William Colby is at the left in the background. (Photo by David Hume Kennerly/Getty Images)
373743 02: Republican Presidential candidate George Bush, wearing a t-shirt referencing his son George W. Bush, stands with his wife Barbara November 1978 in Texas, USA. Bush is campaigning for the presidential primary elections. (Photo by Dirck Halstead/Liaison)
373749 01: Republican Presidential candidate George Bush looks at his wife Barbara November 1, 1978 in Hoston, TX. Bush is campaigning for the presidential primary elections. (Photo by Dirck Halstead/Liaison)
Republican vice-Presidential candidate George Bush and wife, Barbara, welcomed home to Houston, Monday, Nov. 3, 1980 by three-year old granddaughter, Noelle, who was on hand to meet the plane. Bush will have a final home rally and vote in Houston. (AP Photo/Bill Hudson)
American politician (and future US President) George HW Bush speaks at an event during his campaign for the Republican Presidential nomination, Iowa, January 1980. His wife, future First Lady Barbara Bush, stands beside him. (Photo Robert R. McElroy/Getty Images)
NBC NEWS -- 'Ronald Reagan First Presidential Inauguration' -- Pictured: (l-r) U.S. Vice President George Bush, Second Lady Barbara Bush during the first inauguration of President Ronald Reagan on January 20, 1981 in Washington D.C. -- (Photo by: NBC News/NBCU Photo Bank via Getty Images)
373930 01: Vice President George Bush stands with his wife Barbara August 1983 in Kennebunkport, ME. Bush is vacationing in Maine with his family. (Photo by Cynthia Johnson/Liaison)
Bush, George & Mrs. (Barbara); (Photo By Jerry Cleveland/The Denver Post via Getty Images)
Republican presidential candidate George Bush and his wife Barbara stand together on the podium during the finale of the Republican National Convention in New Orleans, Aug. 18, 1988. (AP Photo/Ron Edmonds)
President-elect George Bush and his wife Barbara are shown during a morning beachfront news conference in Gulf Stream, Fla., Nov. 14, 1988. Bush is expected to return to Washington Tuesday after a long weekend vacationing in Florida. (AP Photo/Kathy Willens)
US President George Bush and his wife Barbara wave goodbye from the steps of Air Force one at London's Heathrow Airport, Friday, June 21, 1989, prior to their departure for the United States. President Bush left London on Friday morning at the end of a European visit which included stops at Rome Brussels. Bonn and London. (AP Photo/Dave Caulkin)
Pres. George H. W. Bush, left, talks to reporters on Air Force One as First Lady Barbara Bush, right, looks on, Feb. 9, 1990. Bush defended his military bases and tough talk on defense issues at a time of dramatic changing on in Moscow, saying the timing happened to be fortuitous. (AP Photo/Robert Daugherty)
U.S. President George H. Bush smiles as First Lady Barbara Bush waves as they leave the tarmac following their arrival at Helsinki airport, Wednesday, night, July 8, 1992. Bush arrived Wednesday for a 51-nation summit to plan peacekeeping, economic revival and the growth of democracy in post-Cold War Europe. (AP Photo/Doug Mills)
President George H.W. Bush and first lady Barbara Bush join in song during an ecumenical prayer breakfast in Houston, Aug. 20, 1992. Bush will deliver what could be the speech of his life at the Astrodome Thursday as he accepts the nomination of the Republican Party to serve a second term. (AP Photo/James Finley)
Former President George Bush shows off the James Forrestal award he received in Washington, Thursday, March 18, 1993, as his wife Barbara looks on. The award is given annually by the National Security Industrial Association to an American whose leadership has promoted understanding and cooperation between industry and government. It was the Bushes first return to Washington since leaving the White House. (AP Photo/Stephen R. Brown)
Former President George Bush and his wife, Barbara, are shown in this image from a television monitor Monday, Jan. 22, 1996, in Houston, in a television campaign to help sell season tickets for the Houston Astros. In the campaign, set to debut Jan. 29., the former first couple are seen recalling Bush's days as a first baseman for Yale. (AP Photo/Houston Astros)
Former first lady Barbara Bush, left, ponders what advice she would give her sons if any of them became president after being asked by a student during a question and answer session while being honored with her husband, former president George Bush, at Washington College in Chestertown, Md., Friday, Jan. 29, 1999. Both received honorary degrees of Doctor of Public Service. (AP Photo/John Gillis)
Former President George W. Bush and his wife Barbara pose for photographers prior to AmeriCares Celebration of Hope, 20th Anniversary Gala in New York Tuesday, May 21, 2002. (AP Photo/Osamu Honda)
Former U.S. president George Bush smiles at his wife Barbara, as he holds a golden wreath behind her head during their visit to see U.S. athletes training at the American college in Athens, Friday, Aug. 13, 2004. The wreath was presented to the former president by the college. Bush will visit the Athens 2004 Olympic Games starting in the evening. (AP Photo/Thanassis Stavrakis)
Former President George H. W. Bush, left, and his wife Barbara, sit together in Madison Square Garden during the Republican National Convention in New York, Wednesday, Sept. 1, 2004. (AP Photo/Ed Reinke)
Former President George H. W. Bush reacts to the crowd with his wife Barbara Bush at the Commander-In-Chief Ball in Washington Thursday, Jan. 20, 2005. (AP Photo/Gerald Herbert)
Former U.S. President George Bush, right, and wife Barbara attend a Houston Astros baseball game against the Milwaukee Brewers, Sunday, May 4, 2008, in Houston. (AP Photo/Pat Sullivan)
Former President George H.W. Bush and former first lady Barbara Bush arrive for a ceremony to dedicate an expanded gallery that carries his name at the National Museum of the Pacific War, Monday, Dec. 7, 2009, in Fredericksburg, Texas. The 41st president, who lives in Houston, is a former World War II naval aviator who survived being shot down over the Pacific. (AP Photo/Eric Gay)
Former U.S. President George H.W. Bush, right, and his wife, Barbara, cheer for the Houston Astros during the fourth inning of a baseball game against the Arizona Diamondbacks, Wednesday, May 5, 2010, in Houston. (AP Photo/David J. Phillip)
Former first lady Barbara Bush touches the hair of her husband President George H.W. Bush as they arrive for the premiere of HBO's new documentary on his life near the family compound in Kennebunkport, Maine, Tuesday, June 12, 2012. The premiere was held on the president's 88th birthday. (AP Photo/Charles Krupa)
Former President George H.W. Buch and wife Barbara take part in throwing out the ceremonial first pitch before Game 3 of baseball's American League Division Series between the Kansas City Royals and Houston Astros Sunday, Oct. 11, 2015, in Houston. (AP Photo/Patric Schneider)
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