When Will Rubio Quit?
Rubio advisers are debating whether the senator should drop out before the Florida primary:
Most of his advisers agree he does not have a path to the nomination and some are advising him to get out ahead of the March 15 primary.
Sources within the campaign also say the pressure will only continue to mount following an expected disappointing showing Tuesday, when voters in Michigan, Mississippi, Hawaii and Idaho make their picks in the GOP primary.