By Daniel Strauss (Politico) –
President Donald Trump is wading into the swamp of South Carolina politics in the latest test of his pull in Republican primaries: an effort to save one of the earliest backers of his presidential campaign.
Gov. Henry McMaster, the first statewide elected official to endorse Trump in 2016, is in danger of losing the Republican nomination to an opponent who has portrayed him as an insider mired in endemic political corruption that has befallen state government. McMaster finished first in the June 12 primary but fell short of a majority, prompting a runoff against businessman John Warren — and pushing Trump and Vice President Mike Pence to plan last-minute trips to South Carolina to campaign on McMaster’s behalf.