Nearly $7 billion went to federal election candidates during the 2020 campaign cycle from millions of donors. The increasingly popular ActBlue and WinRed fundraising platforms have made small-dollar donation data public, allowing us to understand much better than in previous cycles not only where money is going, but also who it is coming from.<p>More of that money than ever is coming in the form of small-dollar donations and many of those donors are contributing to multiple campaigns. By looking at where donors' money has overlapped, we can better understand overlaps in support between candidates who will never share a ballot and may never share voting records in congress.