Washington (CNN) – President Barack Obama's campaign is highlighting what they call Mitt Romney's "refusal" to condemn Donald Trump's continued highlighting of the "birther" conspiracy.
The release of a new video by the president's re-election team Tuesday morning comes a few hours after Romney appeared to downplay Trump's comments, and a few hours before Romney teams up with Trump at the business magnate and reality TV star's hotel in Las Vegas for a fundraiser for the presumptive Republican presidential nominee.
Asked on his charter plane Monday night whether Trump's questioning of Obama's birthplace gave him pause, Romney said he was grateful for all his supporters.
"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," Romney said. "But I need to get 50.1% or more and I'm appreciative to have the help of a lot of good people."
Romney has said in the past that he firmly believes Obama was born in Hawaii, and is thus constitutionally eligible to be president.
Trump, however, is decidedly less sure. The "Apprentice" host has been a vocal proponent of the "birther" conspiracy going back several years. And early last year, as Trump flirted with his own bid for the Republican presidential nomination, he claimed he had "investigators" looking into Obama's records in Hawaii. The president released the long-form version of his birth certificate in April 2011, showing he was born in Hawaii on August 4, 1961. Soon after it was released, Trump announced he would not make a bid for the GOP nomination.
The new video by the Obama campaign contrasts Romney with Sen. John McCain of Arizona, the last Republican presidential nominee. The video starts by saying "As Republican nominee, John McCain stood up to the voices of extremism in his party."
Then McCain is seen in clips from the 2008 presidential campaign pushing back against supporters’ claims that Obama wasn't an American. In one of the clips, a woman speaking to McCain at a campaign event says, "I have read about him, he's an Arab.” McCain shakes his head and responds "No ma’am, no ma’am. He's a decent family man, citizen, that I just happen to have disagreements with."
The video then asks, "Why won't Mitt Romney do the same" and proceeds to highlight clips of Trump over the past year questioning whether the president was born in the United States.
Trump will join Romney and former presidential candidate Newt Gingrich for a campaign fund-raiser in Las Vegas on Tuesday evening. Romney's campaign is also raffling a chance to have dinner with the celebrity businessman for supporters who donate $3 to the campaign.
"I want you: Dine with the Donald," a campaign flier proclaims, along with a drawing of Trump in the pose of Uncle Sam.
Trump once again raised questions about Obama's birthplace last week, including in an interview published Friday with The Daily Beast.
"Look, it's very simple," Trump said in the interview. "A book publisher came out three days ago and said that in his written synopsis of his book."
The interview continued, "He said he was born in Kenya and raised in Indonesia. His mother never spent a day in the hospital."
Trump was referring to a literary agency that, in a promotional catalogue from the 1990s, listed Obama has having been born in Kenya. An employee of the agency recently acknowledged that it was her mistake.
But Trump isn't buying it.
"Now they're saying it was a mistake," he told the Daily Beast. "Just like his Kenyan grandmother said he was born in Kenya, and she pointed down the road to the hospital, and after people started screaming at her she said, 'Oh, I mean Hawaii.' Give me a break."
– CNN's Rachel Streitfeld, Kevin Liptak, Paul Steinhauser and Jessica Yellin contributed to this report.