Donald Trump says he's not sure whether Marco Rubio is eligible for the presidency. And Rubio says it's just the latest in a line of Trump's "outrageous" comments designed to suck up media attention. Rubio is a U.S. citizen who was born in Miami. He is, in fact, eligible for the presidency -- even though his parents migrated from Cuba. But Trump stirred controversy on Saturday by retweeting a message suggesting that neither Rubio nor Texas Sen. Ted Cruz, who was born in Canada to a U.S. citizen mother, meet the constitutional requirements for the Oval Office....