The Florida senator has struggled to reconnect with the kind of voters who sent him to Capitol Hill six years ago as a tea party favorite.
President 2016
In Flint debate, tough talk from Clinton, Sanders
Marking a change in tone, the Democratic rivals often speak over each other and make pointed accusations.
Sen. Marco Rubio wins Puerto Rico’s Republican primary
The victory comes after weekend contests where he could do no better than third place.
Bernie Sanders cruises to win in Maine amid lines, frustration
He tops Hillary Clinton 64-36 percent in Democratic caucuses with a turnout so large that some voting sites were overwhelmed.
Trump calls on Rubio to drop out of presidential race
Rubio finished no better than third in any of Saturday’s four Republican primary elections and caucuses.
Sanders’ fundraising ensures he’ll remain in race
The Vermont senator sustains his appeal to young voters and small donors.
Cruz, Trump each grab 2 wins; Democrats also split caucus results
With the Republican race in chaos, establishment figures frantically are looking for any way to derail Donald Trump.
Cruz bests Trump as Maine Republicans swamp caucuses
Republican Party officials say 18,650 voters turn out, three times as many as in 2012, and give the Texas senator 12 of the state’s 23 delegates.
Analysis: For Republicans, substance-free shoutfest marks new low
Many Republican faithful are wondering how they got into this mess and how they will get out of it.
Ben Carson ends Republican bid for nomination
The retired neurosurgeon’s campaign is an example of the big-money business of presidential politics, and even he has wondered whether his aides took advantage of him.