President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Saturday tweeted his endorsement for South Carolina Gov. Henry McMaster (R), urging voters to turn out for the sitting governor in the state's primary contest on Tuesday.

In a tweet, Trump praised McMaster's support for his plan to build a U.S.-Mexico border wall while declining to name any of the governor's competitors.

"Henry McMaster loves the people of South Carolina and was with me from the beginning. He is strong on Crime and Borders, great for our Military and our Vets. He is doing a fantastic job as your Governor, and has my full endorsement, a special guy. Vote on Tuesday!" Trump tweeted.

Henry McMaster loves the people of South Carolina and was with me from the beginning. He is strong on Crime and Borders, great for our Military and our Vets. He is doing a fantastic job as your Governor, and has my full endorsement, a special guy. Vote on Tuesday! — Donald J. Trump (@realDonaldTrump) June 9, 2018

McMaster faces a primary challenge for the Republican nomination from Catherine Templeton, the state's former labor department director, and businessman John Warren. The winner of Tuesday's contest will face a Democratic challenger in November.

ADVERTISEMENT

A May 29-31 poll from Target Insyght reported by Ballotpedia indicated that McMaster holds 37 percent support in the state, while Templeton trails at 25 percent. Warren holds 20 percent.

McMaster tweeted Saturday that he was "honored" to have the president's support, and pledged to keep South Carolina "winning" alongside the Trump administration.

"I am honored to have the full support of President Donald Trump. He will go down as one of the greatest presidents in history, and together we will keep South Carolina winning, winning, winning! Vote on June 12!"