Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks off of his campaign plane past Donald Trump's plane after landing at McCarran International Airport on May 29, 2012 in Las Vegas, Nevada. Mitt Romney will campaign and hold fundraisers Las Vegas, Nevada. (Photo by Justin Sullivan/Getty Images)

The Obama campaign is trying to make even more political hay from Mitt Romney’s decision to attend a fundraiser with Donald Trump.

Here’s a fundraising appeal from the campaign that is signed by Obama himself.

“Think about this: Today, our opponent is facing the same fundraising deadline we are.

But the people I’m counting on at this crucial moment could not be more different.

He’s relying on high-powered special-interest groups and a TV personality who’s spent the last week questioning where I was born.

Our campaign is built by millions of ordinary Americans chipping in what they can, when they can.

Will you help out before midnight? Make a donation of $3 or more right now.”