Don't cross swords with Trump and expect to get elected....
https://www.reuters.com/article/us-usa-election/republican-sanford-loses-in-south-carolina-after-trump-urges-his-ouster-idUSKBN1J811R
WASHINGTON (Reuters) - U.S. Representative Mark Sanford, a vocal critic of President Donald Trump, lost a Republican congressional primary in South Carolina after Trump urged voters to punish Sanford’s disloyalty by tossing him from office.
A few hours before polls closed on Tuesday, Trump tweeted that Sanford was “nothing but trouble” and “very unhelpful to me.” He backed Sanford’s pro-Trump challenger, state legislator Katie Arrington, for November’s congressional elections.
Arrington, who made a campaign issue of Sanford’s criticism of Trump, won 50.6 percent of the vote to Sanford’s 46.5 percent with almost all ballots counted. That just crossed the 50 percent threshold to avoid a runoff later this month between the top two contenders.
The upset of Sanford, a member of the conservative House Freedom Caucus, was the latest sign of Trump’s firm grip on the Republican Party. The onetime insurgent has made allegiance to his leadership a litmus test in many Republican races.