“In a monumental upset fueled by a Donald Trump tweet, Rep. Mark Sanford (R) lost his Republican primary Tuesday night to Katie Arrington (R), a one-term state lawmaker who made loyalty to the president the centerpiece of her campaign,” the Charleston Post & Courier reports.
“The defeat, which carries national implications, marks the first time Sanford has lost an election, which began with his first congressional bid in this very district in 1994.”

