Bernie Sanders is pushing toward another massive fundraising haul in March, potentially surpassing his record-breaking totals last month.

As of Thursday morning, the Vermont senator's campaign said it had pulled in more than $39.7 million, and urging supporters to chip in to surpass the nearly $43.5 million they donated in February. All told, he will have raised an eye-popping $100 million so far in 2016.



"If we were to raise more money by the end of this month at midnight tonight, it would send an unmistakable message to the media and the establishment: we are going to win this campaign and the White House," Sanders wrote in an email to supporters.

Sanders is coming off the best week of his campaign, sweeping three caucuses on Saturday in Alaska, Hawaii and Washington by large margins. The campaign said it raised a whopping $4 million in the 48 hours after the trio of victories, continuing a pattern of hundreds of thousands of donors giving small amounts in droves.

The cash glut will help Sanders compete in Wisconsin next week, where both campaigns expect a photo finish, as well in New York on April 19, where former Secretary of State Hillary Clinton leads in the polls but Sanders plans to put up a major fight.

But even with fistfuls of cash to help pave the way, the road beyond the Badger State looks rough for Sanders' insurgent campaign.

He has tended to perform better in states holding caucuses, where independents are allowed to participate and candidates with a passionate following often win big. Wisconsin's primary is open to independents, giving Sanders the hope he can replicate his surprise victory in neighboring Michigan.

