"People familiar with the race say Haley’s opposition to Trump in the primary is more circumstantial than intentional. Haley also backed Mace’s 2020 campaign, and the congresswoman represents the former governor’s home district. They also note that Haley has endorsed the same candidates as Trump in a host of other races, and they insist they were unaware Trump was planning to get behind Arrington. Haley endorsed Mace the day before Arrington entered the race, and two days before Trump endorsed Arrington. But Haley’s assistance to Mace has been particularly extensive. The former ambassador narrated an entire commercial for Mace, in which she describes the congresswoman as “tough as nails.” In March, Haley held a Charleston fundraiser for the candidate that netted more than $300,000. Haley is also expected to aid get-out-the-vote efforts, and her team has been helping raise small-dollar donations."