During an exclusive interview with The Daily Caller on Thursday, Florida Sen. Marco Rubio said businessman and potential 2012 GOP primary candidate Donald Trump deserves to be taken seriously as a legitimate candidate, noting that “Donald Trump comes to the race with some notoriety — people know who he is.” But when it came to Trump’s questioning whether or not President Obama was born in the U.S., Rubio said: “I would suggest — if he asked for my opinion — not to focus so much on that issue. There are more important things facing our country. I believe Barack Obama...