U.S. Representative Nancy Mace announced she will not challenge Senator Lindsey Graham in South Carolina's 2026 Senate race, effectively closing the door on a potential primary fight within Republican ranks.
Mace's decision follows her failed 2024 gubernatorial campaign, where she competed for South Carolina's top office. The Charleston congresswoman's withdrawal from the Senate contest removes uncertainty about whether Graham would face a serious challenger from his own party.
President Donald Trump's endorsement of Graham for a full term delivered a decisive blow to any Mace ambitions in the Senate race. Trump's backing carries substantial weight in Republican primaries, and his public support for the incumbent senator made a Mace challenge considerably more difficult.
Graham has represented South Carolina in the Senate since 2003 and chairs the Senate Judiciary Committee. The Trump endorsement strengthens Graham's position heading into the 2026 cycle and signals party unity around his candidacy.
Mace, first elected to Congress in 2020, has cultivated a profile as a Trump-aligned Republican. Her failed gubernatorial run tested her statewide viability in her home state. The decision not to mount a Senate challenge suggests she will focus on her House seat or pursue other political opportunities.
The move avoids a potentially divisive Republican primary that could have fractured the party's South Carolina apparatus. With Mace stepping aside and Trump backing Graham, Republicans present a united front in a state they control firmly. Graham's path to renomination and reelection appears clear.