Bradley Cooper is surprised 'American Sniper' fans freaked out over his DNC appearance

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Bradley Cooper was confused to learn that he irked some Republicans for showing up to the Democratic National Convention last week.

The 41-year-old actor portrayed Navy SEAL Chris Kyle in the 2014 biopic, American Sniper -- directed Clint Eastwood, an outspoken Republican -- and is considered by some to have a conservative point of view. Cooper admitted on Tuesday's Late Late Show With James Corden that he "was not expecting" such an adverse reaction to his appearance at the DNC in his hometown of Philadelphia, Pennsylvania.

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"Bradley Cooper is promoting Hillary? Too bad. He's dead to me now," one Twitter user proclaimed.

"Bradley Cooper at DNC?! Guess I've seen my last Bradley Cooper movie. Ewww Ick," another tweet read.

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Cooper said that he and his mother, Gloria Campano, attended the event to see President Barack Obama speak. His Russian model girlfriend, Irina Shayk, was also in attended. "Republicans were up in arms because I was there listening to the president speak," Cooper explained. "I think he was an incredible president. I was really excited."

Hangover director Todd Phillips joined the actor on the Late Late Show couch, and offered up a funny comparison regarding the controversy. "That's like the mob being mad at [Robert] De Niro for being in The Intern," he quipped.

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Cooper and Phillips also recalled a dinner they had with former President Bill Clinton while filming Hangover 2 in Thailand. Phillips said that Hillary Clinton's husband admitted to being a fan of the 2007 comedy Who's Your Caddy, while Cooper remembered the 69-year-old politician jokingly asking to be in the A-Team sequel.

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NEW YORK, NY - JUNE 07: Actors Bill Nighy (L) and Bradley Cooper attend American Theatre Wing's 69th Annual Tony Awards at Radio City Music Hall on June 7, 2015 in New York City. (Photo by Mark Sagliocco/Getty Images)
NEW YORK, NY - MARCH 21: Bradley Cooper and Jennifer Lawrence attend the after party of a screening of 'Serena' hosted by Magnolia Pictures And The Cinema Society With Dior Beauty on March 21, 2015 in New York City. (Photo by Jamie McCarthy/Getty Images)
NEW YORK, NY - MAY 06: Actors Bradley Cooper and Victor Garber attend Sardi's Caricature Unveiling at Sardi's on May 6, 2015 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
WASHINGTON, DC - JANUARY 13: Taya Kyle (L) and Bradley Cooper attend the opening of 'American Sniper' at the Burke Theater at the U.S. Navy Memorial on January 13, 2015 in Washington, DC. (Photo by Larry French/Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0187 -- Pictured: (l-r) Actor Bradley Cooper during an interview with host Jimmy Fallon on January 5, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
WASHINGTON, DC - JANUARY 13: Bradley Cooper attends the opening of 'American Sniper' at the Burke Theater at the U.S. Navy Memorial on January 13, 2015 in Washington, DC. (Photo by Larry French/Getty Images)
NEW YORK, NY - DECEMBER 15: Actors Sienna Miller and Bradley Cooper attend the 'American Sniper' New York Premiere at Frederick P. Rose Hall, Jazz at Lincoln Center on December 15, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
Actor Bradley Cooper during an interview with host Jimmy Fallon on January 5, 2015. (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - DECEMBER 07: (L-R) Bradley Cooper, Patricia Clarkson and Alessandro Nivola attend 'The Elephant Man' Broadway Opening Night - Curtain Call at the Booth Theater on December 7, 2014 in New York City. (Photo by Ben Gabbe/Getty Images)
NEW YORK NY - NOVEMBER 12: Bradley Cooper sighting on November 12, 2014 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0148 -- Pictured: (l-r) Actor Bradley Cooper and host Jimmy Fallon play 'Egg Russian Roulette' on October 17, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
LONDON, ENGLAND - SEPTEMBER 15: Anna Wintour, Suki Waterhouse and Bradley Cooper head to J Sheeky restaurant for dinner on September 15, 2014 in London, England. (Photo by Keith Hewitt/GC Images)
From left, Amy Adams, Bradley Cooper, and Jeremy Renner speak on stage at the 20th annual Screen Actors Guild Awards at the Shrine Auditorium on Saturday, Jan. 18, 2014, in Los Angeles. (Photo by Frank Micelotta/Invision/AP)
From left, Leonardo DiCaprio, Bradley Cooper and Liev Schreiber attend The Weinstein Company's Golden Globes after party at the Beverly Hilton Hotel on Sunday, Jan. 12, 2014, in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision/AP)
From left, Amy Adams, Bradley Cooper and Jennifer Lawrence, winners of the award for best motion picture - comedy or musical for "American Hustle" pose in the press room at the 71st annual Golden Globe Awards at the Beverly Hilton Hotel on Sunday, Jan. 12, 2014, in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision/AP)
Julia Roberts, left, and Bradley Cooper arrive at the Palm Springs International Film Festival Awards Gala at the Palm Springs Convention Center on Saturday, Jan. 4, 2014, in Palm Springs, Calif. (Photo by Jordan Strauss/Invision/AP)
Actors Gerard Butler, right, and Bradley Cooper prior to the Men's singles final match at the All England Lawn Tennis Championships in Wimbledon, London, Sunday, July 7, 2013. (AP Photo/Kirsty Wigglesworth)
Actor Bradley Cooper, center, listens during a panel discussion at the National Conference on Mental Health, Monday, June 3, 2013, in the East Room of the White House in Washington. Cooper and Glenn Close were among those gathering at the White House for a conference on mental health, organized as part of President Barack Obama's response to last year's shooting massacre at a Connecticut elementary school. (AP Photo/Susan Walsh)
Ed Helms, Zach Galifianakis and Bradley Cooper arrive at Warner Bros. Premiere of The Hangover: Part III, on Monday, May, 20, 2013 in Los Angeles. (Photo by Eric Charbonneau/Invision for Warner Bros./AP Images)
Bradley Cooper attends the TIME 100 Gala, celebrating the 100 most influential people in the world, at the Frederick P. Rose Hall, Time Warner Center on Tuesday, April 21, 2015, in New York. (Photo by Evan Agostini/Invision/AP)
Tina Fey, left, and Bradley Cooper present an award onstage during the 84th Academy Awards on Sunday, Feb. 26, 2012, in the Hollywood section of Los Angeles. (AP Photo/Mark J. Terrill)
NEW YORK, NY - MARCH 08: (L-R) Actors Bradley Cooper, Abbie Cornish and Robert De Niro attend Relativity Media's world premiere of 'Limitless' presented by DeLeon Tequila at Regal Union Square Theatre, Stadium 14 on March 8, 2011 in New York City. (Photo by Larry Busacca/Getty Images for Relativity Media)
Bradley Cooper, a cast member in "The Hangover Part II," poses with fans at the premiere of the film, Thursday, May 19, 2011, in Los Angeles. (AP Photo/Chris Pizzello)
From left, actors Zach Galifianakis, Bradley Cooper, Ed Helms, and director Todd Phillips, from the upcoming film "The Hangover Part II", pose for a portrait in Beverly Hills, Calif., Wednesday, May 18, 2011. The film opens in theatres May 26, 2011. (AP Photo/Matt Sayles)
Actor Bradley Cooper arrives at Spike TV "Guy's Choice" awards in Culver City, Calif., on Saturday, June 5, 2010. (AP Photo/Matt Sayles)
Bradley Cooper, left, and Sandra Bullock, fellow cast members in "All About Steve," strike a pose at the premiere of the film in Los Angeles, Wednesday, Aug. 26, 2009. (AP Photo/Chris Pizzello)
Actors Gerard Butler and Bradley Cooper rehearse on stage prior to the 82nd Academy Awards Friday, March 5, 2010, in the Hollywood section of Los Angeles. (AP Photo/Chris Carlson)
Actor Bradley Cooper, a cast member in the upcoming film "The Hangover," poses for a portrait, Saturday, May 16, 2009 in Las Vegas. (AP Photo/Isaac Brekken)
Actor Bradley Cooper accepts the Comedy Star of the Year award at the ShoWest 2009 Award Ceremony, Thursday, April 2, 2009, in Las Vegas. (AP Photo/Chris Pizzello)
Photo by: Walter Weissman/starmaxinc.com ©2006 ALL RIGHTS RESERVED Telephone/Fax: (212) 995-1196 3/8/06 Bradley Cooper at the premiere of "Failure to Launch". (NYC) (Star Max via AP Images)
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While Cooper seems unfazed by the hoopla surrounding his DNC appearance, Blake Shelton went on a Twitter rant last week after a few of his fans, including Debra Messing, assumed he was a Donald Trump supporter. Here's what the country crooner had to say about his political views:

Blake Shelton Clarifies His Comments Allegedly Endorsing Donald Trump

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