South Carolina has had its fair share of bitter Republican primaries over the years, and this cycle looks to be no different.

In the Lowcountry, GOP Rep. Nancy Mace yet again finds herself in a competitive primary — but this time she has Trump’s support, while her opponent is backed by former Speaker Kevin McCarthy, on a revenge tour against the Republicans who ousted him. Upstate, GOP Rep. William Timmons faces a serious challenge from the chair of the South Carolina state legislature’s Freedom Caucus. Both Mace and Timmons are favored to win their primaries, but the contests have forced their allies to spend millions boosting them.

Meanwhile, South Carolina’s most Republican-leaning district is open, since 3rd District Rep. Jeff Duncan decided to retire after his contentious divorce made headlines last fall. Because a crowd of Republicans are vying to succeed Duncan, this race likely won’t be decided on primary night. If no one receives 50% of the primary vote, the top two finishers will face each other in a runoff set for June 25.

SC-01: Nancy Mace (R)

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