Voters return to the polls Tuesday in two contests with different stakes and calendars.
Minnesota holds its statewide primary. In South Carolina, Republicans vote in a special U.S. Senate primary; if no candidate meets the required threshold, a runoff is scheduled for August 25.
The math to watch
In Minnesota, the key signals will be turnout and the geographic distribution of support across statewide contests. In South Carolina, the first question is whether anyone can avoid the runoff; the second is which coalition has the easier two-week path if nobody does.
The election calendar has scheduled its own encore. Campaign vendors, brave souls, have surely already opened another invoice.