Online donors poured a record $392 million into campaigns and causes via ActBlue in June, a sign of surging activism and political enthusiasm on the left that smashed the previous monthly high, from just before the 2018 election, by a whopping 50 percent.

The eye-popping numbers on ActBlue, the favored digital fundraising platform for the Democratic Party as well as a growing host of left-leaning nonprofits, make for a startling split-screen next to Great Depression-level unemployment and spiking coronavirus cases across the country.

But the left’s online giving surge is blunting one of President Donald Trump’s remaining advantages in the presidential election, as his poll numbers sink: his financial edge. Small-dollar donors are filling up Joe Biden’s campaign coffers, giving Democratic Senate and House candidates a financial cushion in many of the biggest 2020 elections, and pouring resources into newly emboldened civil rights organizations, which are scaling up rapidly amid rising support for the Black Lives Matter movement.