Priorities USA and American Bridge, two of the leading Democratic outside groups, are ramping up operations. The organization ACRONYM recently pledged to spend $75 million. And former New York Mayor Michael Bloomberg has pledged to spend $100 million on ads targeting Trump, while California billionaire Tom Steyer promised $50 million.

The billionaires have come under fire from some Democratic rivals for trying to buy the presidency. But the influx of cash is soothing anxiety in some corners of the party that Trump, who has repeatedly broken fundraising records, was off to an unprecedented early start in the 2020 advertising wars. Some had argued that the Democrats’ overwhelming focus on the sprawling presidential primary field allowed the president to burnish a reelection narrative unchallenged ahead of what is expected to be an exceptionally close election.

“It’s safe to say the gap is closing,” said David Brock, who leads several Democratic groups, including American Bridge. “People can breathe a little bit of a sigh of relief that there is a major Democratic response now and that Trump’s spending will be met.”