Mark Sanford concedes in South Carolina Republican primary

President Donald Trump's record for endorsed candidates has not gone well in recent elections, but Tuesday proved to be something new. CNN is reporting that Mark Sanford will not finish first in his primary election.

In a tweet Tuesday afternoon (Wednesday morning in Singapore), the president attacked Rep. Mark Sanford (R-SC), who is facing Katie Arrington.

"Mark Sanford has been very unhelpful to me in my campaign to MAGA. He is MIA and nothing but trouble. He is better off in Argentina. I fully endorse Katie Arrington for Congress in SC, a state I love. She is tough on crime and will continue our fight to lower taxes. VOTE Katie!" Trump tweeted.

The reference to Argentina dates back to when Sanford was governor of the state and having an affair. He told his family and staff he was "hiking the Appalachian Trail" while he was actually in Argentina with his mistress.

Sanford has attacked Trump for the tariffs on aluminum and steel imports, saying they are "an experiment in stupidity." He noted that Trump has done "weird stuff" in office and even went so far as to say Trump was "partially" to blame for the rhetoric that prompted a gunman to attack a congressional baseball practice in 2017.

Given how late Trump tweeted his endorsement, it is unclear how much it actually helped. The poll results are still coming, and if Arrington finishes under 50 percent, Sanford could go into a runoff.

UPDATE:

Sanford conceded to Arrington late Tuesday night as results were still coming in.