In August, he referred to Sanford as "Mr. Appalachian Trail."
And last summer, when Trump stumped for Gov. Henry McMaster in Cayce during the governor's campaign, the president heaped praise on Sanford's 1st District Congressional seat opponent, former state Rep. Katie Arrington.
Arrington ultimately lost in the midterms to Democrat Joe Cunningham.
"She was out campaigning against a guy I've never liked much," Trump said at the June 2018 South Carolina rally. "Tallahassee Trail, it must be a very beautiful place. Unfortunately, he didn't go there."
As of Monday, Sanford had not tweeted back at the president.
However, he told The State Sunday he would "absolutely" go after Trump's character in the weeks and months to come.
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