Pete Buttigieg, the mayor of South Bend, Ind., said Monday that he raised more than $7 million during the first quarter of the year as he explored a White House bid, a total likely to give a boost to his candidacy for the Democratic presidential nomination.

His announcement on Twitter comes as Democrats in a crowded presidential field jockey to show strength in an early test of the potency of their bids.

Reports for money raised through Sunday night are not due until April 15, but some candidates are previewing their totals.

South Bend Mayor Pete Buttigieg (D) spoke about looking ahead to the future and "picking up the pieces of reckless policies that are being made right now." (Jenny Starrs/The Washington Post)

“This is just a preliminary analysis, but our team’s initial report shows we raised over $7 million dollars in Q1 of this year,” Buttigieg said in his predawn tweet. “We (you) are out-performing expectations at every turn. I’ll have a more complete analysis later, but until then: a big thank you to all our supporters.”

A spokeswoman for Buttigieg, who announced an exploratory committee on Jan. 23, said he would provide more details later in the day.

Buttigieg’s total is likely to lag some in the field but exceed expectations for a politician who was largely unknown nationally at the time he entered the race.

Beto O’Rourke, the former congressman from Texas, has said he raised more than $6 million during his first day as a candidate, edging out a one-day total announced a few weeks earlier by Sen. Bernie Sanders (I-Vt.).