Former Vice President Joe Biden announced Monday that his campaign had raised $33 million in the last month. He made this announcement after his huge win in the South Carolina primary Saturday and before Super Tuesday, which he went on to sweep.

The infusion of cash, coupled with the endorsement of Sen. Amy Klobuchar and South Bend, Indiana, Mayor Pete Buttigieg, who both withdrew from the race after disappointing finishes in South Carolina, could catapult the Biden into a position to compete financially with the better-funded campaign of Sen. Bernie Sanders.

Hedge-fund billionaire Tom Steyer also dropped out of the race on Saturday.

Another former rival Beta O’Rourke also endorsed Biden late Monday.

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In a CNN interview, Biden stated that his campaign had already begun “retooling,” as House Majority Whip Jim Clyburn (D-South Carolina) said the campaign needed to do.

The Biden team has also started bringing in people from other campaigns “building up the structure to be able to run a national campaign.”

“Part of the problem was we got started very late. We did not have the resources other campaigns had,” Biden told CNN’s Anderson Cooper. “But, for example, just since the First of February to date, we’ve raised, I think, $33 million in the last 30 days, 31 days.”