MS NOW

Rubio is finally taking the fight to Trump. Is it too late?

Senator Marco Rubio is throwing everything he can at front-runner Donald Trump, but his supporters worry it may be too late.

Republican presidential candidate, Sen. Marco Rubio, R-Fla., speaks during a campaign event at the InterContinental Hotel, Feb. 29, 2016, in Atlanta, Ga. (Photo by David Goldman/AP)
Republican presidential candidate, Sen. Marco Rubio, R-Fla., speaks during a campaign event at the InterContinental Hotel, Feb. 29, 2016, in Atlanta, Ga.AP

Benjy Sarlin