Circa April 2020 (date not set): District conventions convene. (The County Conventions elected delegates to the District Conventions in 2019.)

7 September 2019: The Executive Committee of the South Carolina Republican Party voted unanimously to cancel the Primary. SCGOP Chairman Drew McKissick: "As a general rule, when either party has an incumbent President in the White House, there's no rationale to hold a primary, just as South Carolina Republicans did not hold one in 1984 or 2004, and Democrats did not in 1996 and 2012. With no legitimate primary challenger and President Trump's record of results, the decision was made to save South Carolina taxpayers over $1.2 million and forgo an unnecessary primary. President Trump and his administration have delivered for South Carolinians, and we look forward to ensuring that Republican candidates up and down the ballot are elected in 2020."

11 December 2019: Richland County Circuit Judge Jocelyn Newman issued a ruling [Inglis v Heindel, civ 2019-cp-400-5486] in favor of the South Carolina Republican Party indicating that the party did not have to hold a primary. "The SCGOP's state executive committee acted well within its discretion according to state law and party rules, customs, and precedent."

Saturday 2 May 2020: South Carolina State Convention. Delegate Selection: Delegate Selection Caucus/Convention. Voter Eligibility: Closed Caucus/Convention. The State Convention convenes to elect the 50 National Convention Delegates.

... the State Convention shall ... elect a national committeeman and national committeewoman and to elect at-large delegates ... to the National Convention. [South Carolina Republican Party Rules - RULE 7 (b)(6)]