CNN host Wolf Blitzer called out Donald Trump on Tuesday after the "Celebrity Apprentice" host and birther extraordinaire continued to question the authenticity of President Obama's birth certificate.

Blitzer said that he didn't understand why Trump "doubles down on this birther issue" after the state of Hawaii confirmed the legitimacy of Obama's birth certificate.

"Why are you going through all of this, Donald?" Blitzer asked. "A lot of people do not think it's an authentic certificate," Trump said. "But how can you say that?" Blitzer pressed.

Trump continued to argue that "many people" do not believe in the authenticity of Obama's certificate, and told Blitzer that if he reported the story "accurately," he might get better ratings, which Trump said he thought were "pretty small."

After Trump continued to argue in favor of birther conspiracy thories, Blitzer said, "Donald, you’re beginning to sound a little ridiculous, I have to tell you."

"No I think you are, Wolf," Trump fired back. "Let me tell you something, I think you sound ridiculous and if you’d ask me a question and let me answer it."

"Here’s the question," Blitzer interrupted. "Did the conspiracy start in 1961 where the Honolulu Star-Bulletin and the Honolulu advertiser contemporaneously published announcements that he was born in Hawaii?"

"That's right. And many people put those announcements in because they wanted to get the benefits of being so-called born in this country. Many people did it. It was something that was done by many people even though they weren’t born in the country. You know and so do I. And so do a lot of your viewers, although you don't have many viewers, Wolf," Trump argued.

Blitzer later asked Trump to give him a name of someone who considered Obama's birth certificate fake. "I don't give names," Trump pressed. "Anything else you want to say?" Blitzer said, signifying the end of the interview. "No, not at all," Trump responded.

"I think we're going to disagree on this whole issue, but that of course is your right to do so, my right as well," Blitzer said.

Watch Blitzer call out Trump in the clip above, and the full exchange below: