Donations go to 10 US House races in AK, MT, NC, FL, KS, MI, and PA, where Democratic candidates are slightly behind and need more funding!
Winning just a few of these will expand Democrats' geographic reach, and would create a "House Delegation" majority (26 states whose Reps are half or more Democrat).
The House Delegation majority matters if there are such severe issues with voting that the Electoral college does not grant 270 votes to a candidate (or there is an exact tie 269-269).
For more info see
and
https://centerforpolitics.org/crystalball/articles/the-dreaded-269-269-scenario-an-update/
and
https://projects.fivethirtyeight.com/2020-election-forecast/house/