Senate Leadership Fund (SLF)
Senate Republican majority
The operation.
Senate Leadership Fund (SLF) is the Republican Party's principal super PAC for US Senate races, founded in 2015 by allies of then-Majority Leader Mitch McConnell. It is the Senate GOP counterpart to Senate Majority PAC and operates as the principal independent-expenditure vehicle for Senate Republican leadership. Its affiliated 501(c)(4), One Nation, channels additional undisclosed dark-money contributions.
Major donors.
Notable races.
Sources.
Questions about Senate Leadership Fund (SLF).
What is Senate Leadership Fund?
Senate Leadership Fund (SLF) is the Republican Party's principal super PAC for US Senate races, founded in 2015 by allies of then-Majority Leader Mitch McConnell. It is the Senate GOP counterpart to Senate Majority PAC and is now aligned with current Senate Republican leadership under John Thune.
Who funds SLF?
SLF's largest disclosed donors include casino heiress Miriam Adelson, hedge-fund manager Ken Griffin, Paul Singer, Oracle co-founder Larry Ellison, and Blackstone's Stephen Schwarzman. Its affiliated 501(c)(4) One Nation routes additional undisclosed contributions into SLF.
How did SLF perform in 2024?
SLF spent more than $250 million across the 2024 Senate battlegrounds and won the cycle decisively: Republicans flipped Ohio, Montana, Pennsylvania, and West Virginia, retaking the Senate majority. Its largest single-state spend was the Ohio Senate race against Sherrod Brown.