Joseph R. Biden and Democratic committees had $466 million on hand at the start of the month compared to $325 million for President Trump and the Republicans, flipping what had been a sizable cash-on-hand edge for Mr. Trump earlier this year.
Mr. Biden, the Democratic Party and associated committees raised $364.5 million in August compared to $210 million for Mr. Trump and the Republicans, thanks in part to an influx of cash around the time that the former vice president tapped Sen. Kamala D. Harris of California to be his running mate.
Democratic donations have also been pouring in after the death of Supreme Court Justice Ruth Bader Ginsburg on Friday.
Mr. Trump’s team has pulled back on some advertising in recent weeks to preserve money for the stretch run of the campaign.
Mr. Trump won the 2016 election despite losing the money game to Hillary Clinton and the Democrats, though he’s better-positioned to bring in campaign dollars this time around as the incumbent president.
Mr. Biden’s cash-on-hand total was first reported by The New York Times.