PHILADELPHIA (CBSNewYork/AP) — Bradley Cooper’s appearance at the Democratic National Convention Wednesday night has irked some conservative fans of the actor’s portrayal of Navy SEAL Chris Kyle in 2014’s “American Sniper.”

Cooper was spotted by TV cameras seated at the meeting in Philadelphia alongside his Russian model girlfriend, Irina Shayk.

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Some Twitter users say they plan to boycott Cooper’s future films over his presence at the convention. Another commented that they thought his experience playing Kyle would have rubbed off on him.

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The complaints have been mocked by others who say Cooper was simply acting a role when playing Kyle and conservatives shouldn’t be surprised.

Cooper earned an Oscar nod for “American Sniper,” which became a blockbuster thanks in part to an enthusiastic reception among conservative moviegoers.

The Democratic National Convention showcased a procession of speakers that included a pair of presidents, but it will be Hillary Clinton’s turn Thursday to make her own case for being elected in November.

Wednesday night, President Barack Obama declared there’s never been a man or a woman more qualified than Clinton to be president.

Obama cast Clinton as a candidate who believes in the optimism that drives the nation’s democracy. And he warned against what he called the “deeply pessimistic vision” of Trump.

The president also tried to make a clear distinction between the candidates, drawing from a theme of his previous campaigns.

“It’s about, ‘Yes we can’  and we’re going to carry Hillary to victory this fall, because that’s what the moment demands,” he said.

Clinton appeared onstage to greet Obama with a long embrace.

Her running mate, Virginia Sen. Tim Kaine, formally accepting his nomination as vice president and took Trump to task as well.

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