MYRTLE BEACH, South Carolina — Former President Donald Trump is banking on a “gigantic” victory Saturday that would mark his fifth straight primary win and show of force that Trumpism has taken over the GOP.

Trump has defied the odds, facing 91 criminal charges but never trailing the GOP presidential field that at one point had a dozen challengers seeking to be the Republican nominee. A win Saturday over his last major competitor, former U.S. Ambassador to the United Nations Nikki Haley, would come with added symbolism of snuffing her out in her home state of South Carolina.