Political leanings: Democratic2024 total spending: $391.2 millionSenate Majority PAC, formally known as SMP, is a super PAC that describes its “one mission” as helping Democrats “win Senate races.” As a super PAC, Senate Majority PAC is allowed to raise and spend unlimited amounts of money, but it must report expenditures and all donations of more than $200 to the Federal Election Commission. We don’t know who is donating to Majority Forward because the group is not required to disclose its donors. However, according to FEC data through March, Senate Majority PAC’s largest contributors include Majority Forward, the George Soros-funded Democracy PAC and retired media executive Fred Eychaner. During the 2024 elections, SMP spent about $391.2 million and more than $325 million of that was contributed to other political committees, including WinSenate PAC, an affiliated super PAC that also worked to elect Democrats to the Senate.