Florida Sen. Marco Rubio's campaign to become the Republican presidential candidate is currently on an upswing. His strong performance at the Republican debate last week boosted his popularity, and on Friday he bagged the support of billionaire donor Paul Singer. Singer is an influential Republican fundraiser who had reportedly been courted by Jeb Bush and Chris Christie.

Dan Balz, chief correspondent of the Washington Post, has written about Rubio's candidacy, and shared some of his thoughts with host A Martinez. 

To listen to the full interview, click on the blue audio player above.