It's Tuesday — you know what that means (at least...in the spring and summer of even-numbered years): another evening of election results. 

Primaries are being held today in four states: Maine, Nevada, North Dakota, and South Carolina. Here are some of the key races we're keeping an eye on:

Maine

The main (Maine?) event, of course, is the Democrat primary for U.S. Senator, with the scandal-plagued Graham Platner squaring off against Governor Janet Mills. With all of the Platner baggage that has come to light of late, how close will it be? And both the Democrat and Republican races for governor could split sufficiently that ranked-choice voting kicks in. 

RELATED: Uh Oh: Ro Khanna Just Made the Graham Platner Scandal Even Worse — Will Reporters Follow Up?

Dems Sold Their Souls for Platner, but They're Not Going to Like This New Shock Data

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Nevada

Republican Governor Joe Lombardo is facing several challengers in his primary, but is expected to win handily. The House race in NV-2 will be interesting, with 13 Republican candidates in the mix. (President Trump has endorsed retired Air Force Lt. Col. David Flippo.)

South Carolina

It's the Governor's race in the Palmetto State that will draw some attention, with President Trump having thrown his support behind Lt. Gov. Pamela Evette, rather than Rep. Nancy Mace (SC-01). Then, too, Lindsey Graham is being challenged for the Senate nomination, most notably from businessman Mark Lynch. (I suspect Lindsey's probably safe, though.)

Polls close as follows: 

We'll be watching them here at RedState, and you can, too. We'll bring you the live results right here, thanks to our partnership with Decision Desk HQ, so be sure to check in — and participate in the comments below.