April 13, 2015
Florida Senator Marco Rubio became the third Republican Senator to join the 2016 presidential race on Monday, joining Kentucky's Rand Paul and Ted Cruz of Texas. Rubio held a call with donors Monday morning to let them know he was running. A public announcement will come this evening at downtown Miami's Freedom Tower.
Rubio has averaged about 7% in recent Republican preference polling putting him in the middle of the pack, trailing his political mentor Jeb Bush who is polling in the mid-teens in a crowded field of prospective nominees. Bush has not yet declared his candidacy for 2016.
There hasn't been a great deal of early polling for a general election match-up between Rubio and Hillary Clinton; that link will let you track the race and also links to an interactive map that looks at polling + 2012 results in unpolled states.