Bernie Sanders gives his "Where We Go From Here" Speech at a rally at Town Hall in New York City.
Bernie Sanders gives his "Where We Go From Here" Speech at a rally at Town Hall in New York City.

Democratic presidential hopeful Bernie Sanders' campaign announced Wednesday it raised nearly $6 million during its first day of online fundraising, easily exceeding first-day totals amassed by his rivals.

More than 220,000 donors contributed to Sanders, a Senator from Vermont, in a 24-hour period since he announced his bid Tuesday for the White House, eclipsing his 2015 first-day fundraising total of more than $1.5 million.

Democratic presidential candidate, Sen. Bernie Sanders, I-Vt, speaks during a campaign rally, May 2, 2016, in Fort Wayne, Ind.
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Public disclosures showed Senator Kamala Harris of California was previously the top early Democratic fundraiser, with more than 38,000 donors contributing $1.5 million. Harris announced her candidacy on January 21.

Senator Elizabeth Warren of Massachusetts raised nearly $300,000 online on December 31, the day she announced an exploratory campaign committee.

Sen. Elizabeth Warren, D-Mass., speaks to local re
Sen. Elizabeth Warren, D-Mass., speaks to local residents during an organizing event, Feb. 10, 2019, in Cedar Rapids, Iowa.

Senator Amy Klobuchar raised more than $1 million in 48 hours after launching her campaign on February 10, campaign officials said.

Sanders' show of strength is not surprising. He raised more than $200 million when he opposed Hillary Clinton in the 2016 presidential race.

Democratic presidential candidate, Sen. Bernie Sanders, I-Vt, speaks during a campaign rally, May 2, 2016, in Fort Wayne, Ind.
Bernie Sanders Joins 2020 Presidential Race
The list of Democrats battling to oppose U.S.

In its announcement Wednesday, the Sanders campaign touted a large grassroots donor base that includes individuals who have already "contributed $600,000 in donations that will recur every month."