Sen. Bernie Sanders’ (I-Vt.) second bid for the White House is barely out the gate, but the lawmaker already has a formidable war chest after leveraging the support of small donors who propelled him to the top of the Democratic pack in 2016.

Sanders raised nearly $6 million from 223,047 individuals in the 24 hours after launching his campaign Tuesday morning. In total, he had surpassed $6 million and 225,000 donors as of Wednesday morning.

The number far outpaces other prominent Democrats who have launched their own bids and is more than double the $1.5 million raised by Sen. Kamala Harris (D-Calif.) in her first 24 hours.

“The only way we will win this election and create a government and economy that work for all is with a grassroots movement ― the likes of which has never been seen in American history,” Sanders said in a message to supporters on Tuesday. “They may have the money and power. We have the people.”

The senator’s campaign said the average size of the donations, about $27, mirrored the small-scale support seen in 2016.

The Democratic field is already crowded. A dozen people have launched campaigns, and several prominent names, including former Vice President Joe Biden, are still mulling their own bids.