(CNN) - Comments over the validity of President Barack Obama's birth certificate made by Texas Gov. Rick Perry could overshadow the Republican presidential candidate's roll out of his "Cut, Balance, and Grow" economic plan.
Tuesday morning the Texas governor unveils his proposal–which includes a 20% new flat tax rate–at a speech in South Carolina, the first southern state to vote in the race for the GOP nomination. But when Perry goes before cameras later in the day at a scheduled news conference, reporters will most likely pepper the Texas governor over comments he made in an interview that appeared over the weekend in the on-line edition of Parade Magazine. Perry also said it's "fun to poke" at Obama over the birth certificate issue in an interview with CNBC.
In the Parade Magazine interview, Perry said he believes the president was born in the United States, but was less confident that the long form birth certificate that the state of Hawaii released earlier this year after a request by the president was real. Obama was born in Hawaii.
"I don't know. I had dinner with Donald Trump the other night," Perry said. "He doesn't think it's real."
Trump, the businessman, real estate mogul and reality TV star, championed the "birther" movement earlier this year, when he flirted with a bid for the GOP nomination.
Monday, Karl Rove criticized Perry, saying the Republican presidential candidate may harm his campaign by stoking the "birther" controversy.
"You associate yourself with a nutty view like that, and you damage yourself," said Rove, a top political adviser to former President George W. Bush.
Rove, who doesn't have a close relationship with Perry, made his comments in an interview on Fox News.
Tuesday morning, hours before Perry was set to unveil his economic plan, the controversy was injected with new life, thanks to an interview Perry gave to CNBC top political reporter John Harwood.
"Look I haven't seen his, I haven't seen his grades. My grades ended up on the front page of the newspaper, so let's you know, if we're going to show stuff, let's show stuff, but look that's all a distraction, I mean I get it. I'm really not worried about the president's birth certificate. It's fun to poke at him a little bit and say 'Hey, how about let's see your grades and your birth certificate," said Perry, in his interview with Harwood.
As for Trump, his spokesman late Monday night released a statement from the real estate mogul saying "despite releasing what is alleged to be his birth certificate, serious questions remain…is it authentic? I don't know."
– CNN's Rebecca Stewart and Kevin Liptak contributed to this report.