Alyce McFadden had this information in Center for Responsive Politics. Here is an excerpt:
Democrats edged out Republicans in fundraising from small-dollar donors during the first quarter of 2021, getting the 2022 election cycle off to an early — and expensive — start.
Democratic congressional candidates received a cumulative $25.8 million from individuals donating $200 or less, representing more than a quarter of the party’s total first-quarter haul of nearly $101 million. Republicans raised less overall, bringing in $88.6 million total. A larger share — 29.4 percent — of the GOP’s 2021 sum came from small-dollar donations.
Democratic Senate candidates edged out Republicans with small-dollar donors, raising a total of $11.4 million while Republicans running for Senate raised $9.9 million. Democrats seeking Senate seats also raised more overall, bringing in $36.5 million to $26.1 million for Republicans.