WHAT TO WATCH — We’ve got a big primary week on tap putting up plenty of questions about the state of American politics. Let’s dive in:
How does Trump’s influence shape South Carolina? The former president has endorsed two challengers on the GOP primary ballot this week in South Carolina: Katie Arrington, who is taking on Rep. Nancy Mace, and Russell Fry, who is facing impeachment-supporting Rep. Tom Rice.
Rice has long looked to be in trouble — POLITICO’s Ally Mutnick wrote in February that he and Rep. Liz Cheney appeared to be “in the greatest peril of the seven [GOP impeachment supporters] who are running for reelection.” But he has been defiant about his support for removing Trump from office last year. South Carolina’s runoff rules could kick this primary to a one-on-one contest if no one gets 50 percent of the vote.
Mace didn’t take that crucial vote that…