Donald Trump Claims Obama's 'Dreams of My Father' Ghost Written by Bill Ayers

Apparently, the birth certificate was just the beginning.

Donald Trump, the real estate mogul and reality TV star recently turned birther, now says that liberal activist Bill Ayers wrote President Barack Obama's signature book, "Dreams of My Father."

"'Dreams of My Father' was genius, and they give him full credit," Trump said of Obama in an interview Wednesday with conservative radio host Laura Ingraham. "But now it's coming out that Bill Ayers wrote it. And [Obama's] only there because of 'Dreams of My Father.'"

Ayers, a co-founder of the radical Weather Underground movement that carried out bombings in the U.S. in the early 1970s, briefly became an issue during the 2008 presidential campaign because of his contacts with Obama in Chicago.

Trump's accusation echoed an unfounded theory popular with some on the extreme right and raised more questions about why Trump, who is seemingly a potential Republican presidential candidate, is on a whirlwind media tour this week establishing himself as a "proud" birther.

"Why doesn't he show his birth certificate?" Trump asked during an appearance last week on ABC's "The View" in his first public show of support for those who claim Obama was born outside the United States and is therefore ineligible to be president.

The state of Hawaii, where Obama was born, has released his official birth certificate. Claims that the president was born outside the United States have consistently been proven to be false.

Trump went even further on Fox News' "The O'Reilly Factor," saying the president might be concealing his real birth certificate because it might say he's Muslim.

"He may have one, but there is something on that birth certificate," Trump explained to host Bill O'Reilly. "Maybe religion. Maybe it says he's a Muslim. I don't know. Maybe he doesn't want that. Or he may not have one. I will tell you this: if he wasn't born in this country, it's one of the great scams of all time."

Trump responded to criticism from GOP presidential hopeful Tim Pawlenty that questioning Obama's citizenship should be off-limits, by telling Ingraham, "I'm proud" to be called a birther. "These are great people. These are really great American people. These are hardworking, unbelievable, the salt-of-the-earth people."