Bernie Sanders will meet with his aides and "reassess" his campaign after today's primaries in Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island, according to a campaign aide.
The news comes the same day Republican front-runner Donald Trump encouraged Sanders to run as an independent. The senator from Vermont has thus far ruled out that possibility.
Today's contests have 384 Democratic and 172 Republican delegates at stake. Leading analysts suggest that Republican Donald Trump and Democratic front-runner Hillary Clinton are putting their bets on these primaries to extend their dominance, while their challengers Ted Cruz, John Kasich and Bernie Sanders have vowed to remain in the race.