COMMERCE, Mich. (AP) - Wading into a debunked conspiracy theory, Mitt Romney raised the issue of President Barack Obama's citizenship Friday by joking that "no one's ever asked to see my birth certificate."
At a rally in the suburbs of Detroit, Romney told a crowd of about 5,000 that he and his wife were happy to be back near their childhood home.
"They know that this is the place that we were born and raised," the candidate said.
The remark was a clear reference to the discredited claims that Obama was not born in the United States and thus ineligible to be president. Hawaii officials have repeatedly verified Obama's citizenship, and courts have rebuffed lawsuits over the issue.
The Obama campaign decried the remark, saying Romney was embracing "the most strident voices in his party instead of standing up to them."
Top Romney adviser Kevin Madden tried to walk the comments back shortly after, saying: "The governor has always said, and has repeatedly said, he believes the president was born here in the United States."
Madden said Romney did not need to apologize because he was simply drawing attention to the fact that Michigan, where he was campaigning, was the state where he himself was born and raised.
But Romney's comments overshadowed an enthusiastic rally where he otherwise devoted himself to criticizing Obama's economic record and laying out a prescription of fiscal discipline, regulatory overhaul and freer markets to create more jobs and energize the private sector.
It also gave Democrats, for the second day in a row, an opportunity to jump on Romney remarks that distracted from the run-up to the Republican convention next week.
The birth certificate comment for the moment aligned Romney with a conservative fringe that has pursued the issue. Among the most prominent Romney backers who have questioned Obama's birth in Hawaii have been developer Donald Trump.
"Throughout this campaign, Governor Romney has embraced the most strident voices in his party instead of standing up to them," said campaign spokesman Ben LaBolt. "Gov. Romney's decision to directly enlist himself in the birther movement should give pause to any rational voter across America."