In what has to be a dark day for birthers, it seems Donald Trump, their most popular champion, has tired of talking about President Obama's disputed birth certificate.

At the top of an interview with CNN on Thursday morning, the brash billionaire bristled when the host asked him about the topic that has been on the tip of the tongue for months.

"You have to stop asking me about a birth certificate," Trump told CNN’s "American Morning" hosts Kiran Chetry and Ali Velshi. "You've got to stop asking the questions."

Trump, who has led numerous GOP presidential polls due, largely, to his beating the birther drum, complained that the issue doesn't allow him to talk about other problems like the trade deficit.

“The problem is every time I go on a show — like as an example, this morning — the first question you asked me is about the birth certificate," Trump, who has has yet to announce his intention to run for president said. "I think my strength is jobs, the economy and protecting our nation from OPEC, China and the other countries that are ripping us off.”

Velshi fired back by offering the bestselling author of "The Art of the Deal" ... a deal.

"We'll stop asking you the questions when you stop saying that President Obama can't prove he is born in the United States," Velshi said.