Sign up for the MSNBC newsletter

You have been successfully added to our newsletter.

Let our news meet your inbox

Will Marco Rubio be a formidable candidate?

Will Marco Rubio be able to rise up as a challenge to Jeb Bush, who was once Rubio's mentor? The Washington Post's Ed O'Keefe, Lynn Sweet of the Chicago Sun-Times, Bill Scher of Campaign for America's Future and Republican strategist Joe Watkins discuss.

BEST OF MSNBC

Play All