President Obama’s campaign is pushing Mitt Romney to disavow Donald Trump and highlight the mogul’s comments about the president’s birth certificate.

Romney and Trump are hosting a fundraiser together at the celebrity businessman’s Las Vegas hotel tonight.

A new Obama campaign Web video contrasts Romney’s acceptance of Trump with Sen. John McCain (R-Ariz.), who in 2008 confronted supporters who said they were “scared” of the Democratic candidate and called him “an Arab.”

The narrator sums it up this way: “Two Republican nominees. Only one willing to lead.”

After shots of Trump suggesting Obama’s birth certificate is not real or lists him as a Muslim, Romney strategist Eric Fehrnstrom is shown saying “a candidate can’t be responsible for everything that their supporters say.” The video ends with Trump saying that he “really became friendly with Mitt Romney.”

Trump and his skepticism largely faded from public view after Obama released his long-form birth certificate in April 2011. But just last week, the mogul tweeted, “I wonder if @BarackObama ever applied to Occidental, Columbia or Harvard as a foreign student. When can we see his applications? What do they say about his place of birth.”

Asked Monday about Trump’s repeated questioning of Obama’s birthplace, Romney distanced himself from his wealthy supporter but did not condemn him.

“You know, I don’t agree with all the people who support me and my guess is they don’t all agree with everything I believe in,” he said. “But I need to get 50.1 percent or more, and I’m appreciative to have the help of a lot of good people.”