Political fundraising slowed in March as the coronavirus pandemic forced millions of Americans out of work and ground traditional campaign activities to a halt.

After raising in $33 million in the first half of March, former Vice President Joe Biden’s fundraising slowed down significantly, to less than half of that (about $13.7 million) in the second part of the month.

President Trump’s campaign and the Republican National Committee brought in about $63 million over the last month, down from more than $86 million in February.

With the coronavirus outbreak still in full swing in the United States, the campaigns may not fare much better in April, something Biden addressed in a fundraising email sent to his contributors, Monday night.

“I know that April may not match March in fundraising, and that’s okay by me,” he wrote. “The world has changed a great deal. It’s unrecognizable at times. Your family and your community need your generosity and strength now more than ever.”

However, Biden still set a personal best for his campaign in March, raising a total of $46.7 million during a month in which he scored key wins against main rival Senator Bernie Sanders, who exited the race this month.

“The slower fundraising pace is somewhat predictable,” said Jon Reinish, a Democratic strategist. “As the coronavirus has spread, businesses across the country have shuttered and millions of Americans have found themselves out of work and in shakier financial situations.”

“No matter what the enthusiasm level is — and I think it’s sky high — this is a really tough environment to raise money in,” Reinish said. “It’s just a lot harder to do when people are trying to navigate a whole new way of carrying out their day to day existence.”

“Any falloff is to be expected when your donors at the grassroots level are the ones losing jobs,” he said.