MSNBC Live 03/09/16

What will Marco Rubio do if Donald Trump nabs nomination?

Marco Rubio claims he has no interest in joining forces with front-runner Donald Trump and running as his vice presidential candidate. But If Donald Trump indeed scores the Republican nomination, will Marco Rubio let bygones be bygones and at least back his fellow GOP candidate? Rubio explains to NBC's Chuck Todd where he stands. ... more Duration: {{video.duration.momentjs}}