Republican Marco Rubio on ABC News Rules Out 2012 Presidential Run (Video)

"I just got elected 3 months ago, how can I be a full-time United States senator if my eye is on something else"

Few new senators arrived in Washington this year with more fanfare than Marco Rubio, R-Fla. But he has kept a decidedly low profile since winning election in November, concentrating on Florida issues and turning down all national interview requests. That is, until now.

In a wide-ranging interview -- his first national interview since being elected -- Rubio discussed the military campaign in Libya, President Obama's leadership, the so-called birther movement and his political plans for 2012 and beyond.

ABC News spent several days with Rubio in Washington and Florida, getting exclusive, behind-the-scenes access to a 39-year-old Republican whom many conservatives would like to see run for presiden