Rep. Mark Sanford, one of President Donald Trump's sharpest Republican critics, was ousted by a primary challenger on Tuesday after Trump waged an extraordinary last-minute effort to defeat him.
The South Carolina congressman lost to state lawmaker Katie Arrington, who won Trump's support just hours before the polls closed Tuesday. Trump lashed out against Sanford, declaring him "unhelpful" in a tweet and referring to his 2009 extramarital affair.
Sanford becomes just the second sitting member of Congress to lose in a primary this year. The president's broadside marked the first time he targeted a congressional Republican incumbent in the midterms.