Maine's Senate race and much more. Here are the primary contests to watch today

Voting stickers are displayed on a table at a polling place inside City Hall, Tuesday, Nov. 5, 2024, in Las Vegas. John Locher/AP Photo hide caption

Today's primary contests stretch from Maine to North Dakota, South Carolina and Nevada, where voters will decide on races for the U.S. Senate, House, governor and more.

A lot is riding on the Senate race in Maine, where political newcomer Graham Platner, facing a series of controversies, is the presumptive Democratic nominee to take on Republican Sen. Susan Collins, who has had the job for 30 years.

Another Republican incumbent, Nevada's Gov. Joe Lombardo, is facing a tough challenge in November.

And in a field of MAGA-devoted Republicans in South Carolina, Lt. Gov. Pamela Evette was the one to grab President Trump's endorsement in the race for governor.

Here, reporters from the NPR network tell us about the key races to watch.

Maine U.S. Senate seat | Maine's 2nd Congressional District | Maine governor | Nevada governor | South Carolina governor

You can also check out voter resources for the June 9 primaries from the NPR network.