(CNN) – Donald Trump predicted fanning the "birther" flames is a "positive thing" for Republican presidential candidate Rick Perry.
During an interview with CNN's Piers Morgan, the real estate mogul said the issue would help the Texas governor in the Republican presidential primary, but might not be "good for him in the general election."
Trump championed the "birther" issue during his flirtation with a bid for the White House. President Barack Obama, who was born in Hawaii, eventually released the long form version of the document to seemingly combat the growing rumors.
Texas Gov. Perry recently expressed doubts about the validity of the birth certificate.
On Wednesday, Perry told Florida's Bay News 9 he was "just having some fun with Donald Trump."
But Trump continued to raise questions about the certificate, saying Obama "might have been" born in America.
"My gut tells me a couple of things. Number 1, you know it took a long time to produce this certificate and when it came out, as you know, you check out the internet, many people say it is not real. Okay? It's a forgery," Trump said. "And the other thing is, nobody has been able to see the day of his birth, they had twins born, they had the other one born. Nobody has been able to find any records that he was born in that hospital."
CNN released the results of its own investigation into the controversy earlier this year. Documents and statements from numerous public officials and childhood friends made clear that the president was born in Hawaii on August 4, 1961.
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