South Carolina Gov. Henry McMaster (right) with President Donald Trump on Monday, speaking to the crowd at Airport High School in West Columbia, S.C. McMaster, one of Trump’s earliest and most loyal supporters, won a key runoff Tuesday.

South Carolina Gov. Henry McMaster (right) with President Donald Trump on Monday, speaking to the crowd at Airport High School in West Columbia, S.C. McMaster, one of Trump’s earliest and most loyal supporters, won a key runoff Tuesday.