Mega-millionaire Donald Trump today said during an interview with FoxNewsInsider that Barack Obama is having trouble with, and spending millions to fight, the ongoing questions about his birth, his birth certificate and his eligibility to hold office – and the longer the issue goes on, the more he is convinced there are problems with the president's eligibility. His newest comments on an issue he first raised in an ABC interview more than a week ago came today on the Fox News Channel. "The fact is if you're not born in the United States, you cannot be president. He is having...