Sen. Bernie Sanders’ 2020 presidential campaign announced Tuesday morning that it reached four million individual contributions faster than any presidential candidate in history, a milestone the campaign touted as evidence that the Vermont senator is surging with less than 80 days to go before the Iowa caucuses.

“This is what momentum looks like,” Faiz Shakir, Sanders’ campaign manager, said in a statement.

“Working class Americans across the country are chipping in $3, $18, $27, or whatever they can to help elect Bernie Sanders,” Shakir added, “because they know he is the only candidate who will fight for them and take on corporate greed and corruption.”

The Sanders campaign said it did not reach four million individual contributions in 2016 until after the New Hampshire primary in February.

“This is damn impressive,” tweeted progressive strategist Rebecca Katz.