The RNC raised nearly $21 million in July

The Republican National Committee told Axios ahead of its FEC filings Tuesday that the group raised $20.8 million in July — largely due to online fundraising campaigns around Robert Mueller's testimony and the 2020 Democratic debates.

Why it matters: That's the most money the organization has raised in July in an off-cycle year — nearly double the $10.6 million it received from GOP donors in July 2017.