Donald Trump blasted the latest attack ad by the Karl Rove-linked super PAC American Crossroads as "one of the worst commercials" ever.

“I thought it was one of the worst commercials, in terms of what they were trying to do, that I’ve ever seen,” Trump said on a call with MSNBC’s "Morning Joe."

The ad paints Obama as a "celebrity president," and features clips of the president slow jamming the news on "Late Night" with Jimmy Fallon and singing Al Green. The ad proclaims that "America elected the biggest celebrity in the world" in 2008, and asks viewers, "is your life any better?"

“They are making Obama look great," Trump said. "They are making him look like that’s the man we want to be president. I looked at that clip very closely, and actually, I couldn’t believe it.”

Trump has been one of Obama's biggest critics, questioning how he was admitted to two Ivy League schools and demanding to see the president's birth certificate. The billionaire flirted with the idea of challenging Obama by running for president before announcing in May 2011 that he would not seek the Republican nomination.

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