PALM BEACH, Fla. –As the presidential campaign season begins to get into full swing, radio host Rush Limbaugh is again raising questions about President Barack Obama's personal background, wondering where all of his former girlfriends, classmates and students are. "I got one of these email things," Limbaugh said on his program this afternoon. ...This one is, 'Where are all of Obama's former girlfriends?' It's a takeoff on where are all of the students Obama taught who claim to have been inspired by him when he taught law at the University of Chicago. Where are all of the former classmates of...