What to watch: Georgia Republicans on Tuesday are choosing their nominee for governor in a runoff after no candidate received a majority of the vote in May. The candidates, Lt. Gov. Casey Cagle and Secretary of State Brian Kemp, have been jockeying for the title of Most Trumpian, understanding that support for President Trump has helped decide close primaries this year.



Here’s our guide to the Georgia primaries » Read more

Last week, the president endorsed Mr. Kemp, an incendiary politician whose campaign ads have shown him promising to “round up” undocumented immigrants and wielding a shotgun next to a man who wants to date his daughter.

The winner of the runoff will face Stacey Abrams, the Democratic nominee, who is hoping to become the first black woman to govern any state.

There are also runoffs in the Republican primaries to replace Mr. Cagle and Mr. Kemp as lieutenant governor and secretary of state. And Democrats in the Sixth and Seventh Districts will finalize their nominees for House races that could be competitive in November.

— MAGGIE ASTOR