The Harris campaign announced Friday morning that it had raised $310 million in July, the biggest amount so far in the 2024 campaign cycle and more than double what Republican nominee Donald Trump raised, the bulk of it built on the rollout of Vice President Harris as the likely nominee of the Democratic Party.

More than $200 million of the total haul came in the week after President Biden said on July 21 that he was ending his reelection campaign and endorsed the vice president. Many Democrats had told pollsters that they were concerned about Biden’s age, and Harris’s ascent appeared to have delivered a jolt of fundraising energy.

The Harris campaign says it has $377 million in cash on hand.

Trump’s campaign announced Thursday that it had raised $138.7 million during the month of July. Still, Trump’s operation says it has $327 million in cash on hand, based on strong fundraising in previous months.

The figures provided by the campaigns cannot be confirmed until later this month, when the official financial disclosure forms are filed.

The Harris campaign says it has raised $1 billion so far this cycle, the fastest a presidential campaign has hit that threshold. That includes the phase when Biden was the candidate as well as the recent stretch when he ceded that role to her.

Two-thirds of the $310 million that Harris raised in July came from first-time donors, according to the campaign, in an indication of the momentum that Harris built after Biden dropped out. The campaign says 3 million donors made over 4.2 million contributions, with 2 million donors making their first donation of this presidential cycle.

Some 94 percent of the donations were under $200, with teachers and nurses among the top occupations among the contributors.

In another sign that Harris is tapping into support where Biden struggled to do so, particularly among young people, her campaign reported having 10 times the number of donors in July as in the previous month from Gen Z, or people born between the mid-1990s and mid-2010s.

Similarly, the campaign said it had eight times the number of millennial donors, those born between the early 1980s and the mid-1990s, as the month before. Some 60 percent of donors in July were women.