(CNN) – He off-handedly questioned President Obama's birthplace last week – a comment that drew strong rebukes from some quarters - but now business mogul Donald Trump says he's more concerned than ever that the president was, in fact, not born in the United States.
Trump – who, however improbably, claims to be considering a presidential bid – said Monday that since his first public statement on the issue last week, "a lot of facts are emerging" that are making him question more seriously where Obama was born.
"I am really concerned," Trump said during an appearance on Fox News. "You have no doctors, you have no nurses … that remember."
"I brought it up just routinely, and all of the sudden a lot of facts are emerging, and I am starting to wonder myself whether he was born in this country," he exclaimed.
In an interview with ABC last week, Trump claimed that nobody remembered Obama as a child in Hawaii – a statement that was categorically false. His kindergarten teachers and others have previously given interviews with local Hawaii papers detailing their memory of Obama at that time.
Trump did not repeat that claim Monday, but brushed off past statements from current Hawaii Gov. Neil Abercrombie that he remembers Obama being born.
"I doubt it," Trump said of Abercrombie's contentions. "I think this guy should be investigated. He remembers when Obama was born? Give me a break. He's just trying to do something for his party."
In 2008, the Obama campaign produced a certification of live birth that reports his birthplace as Honolulu, Hawaii. He attended kindergarten there before moving to Jakarta, Indonesia with his stepfather at age six. Trump, like others who question the president's birth place, is not satisfied with the certification of live birth.
"They give you a certificate of live birth, which anybody can get. Just walk into the hospital and you get a certificate of live birth," he said. "It's not even signed by people."
Among other evidence Obama was born in Hawaii is the fact the hospital where he was born took out ads in two Hawaiian newspapers in 1961 announcing the birth. But Trump isn't buying that either:
"That was placed in the paper days after he was born. He could have come into the country and then did it for social reasons – for whatever reasons."
And one more thing that irks Trump - using "birthers" to describe those who continue to press this issue.
"I don't like the term birthers," he said. "I think it's unfair to them. These are people that want to see a birth certificate. They want to know the president was born here."