The year's first downballot primaries start Tuesday. Here's our guide to all the key races

With both parties' presidential nomination contests all but decided, the nation's downballot primary season starts with a bang Tuesday. Five states—including the two largest—pick their candidates for state and federal offices in elections that will help shape the state of play in key races at all levels.

Below, you'll find our guide to all of the top races to watch on Super Tuesday, arranged chronologically by each state’s poll closing times. When it’s available, we'll tell you about any reliable polling that exists for each race, but if we don't mention any numbers, it means no recent surveys have been made public. You can also check out our most recent episode of "The Downballot" podcast for an even deeper dive on many of these primaries.

Two states on the docket will also be using brand-new congressional maps, though for very different reasons. In Alabama, a federal court drew up new boundaries after ruling that the Voting Rights Act required the creation of a second seat where Black voters could elect their preferred candidate. In North Carolina, though, the Republican-controlled state Supreme Court gave GOP legislators the green light to draw up an aggressive new gerrymander, a task they eagerly took on.

You can find interactive maps from Dave's Redistricting App for Alabama and North Carolina's new boundaries, as well as the maps that first came into use in 2022 for Arkansas, California, and Texas.

You can find Daily Kos Elections' 2020 presidential results for each congressional district here, as well as our geographic descriptions for each seat. You’ll also want to bookmark our primary calendar, which includes the dates for primaries in all 50 states.

We'll be liveblogging all of these races at Daily Kos Elections on Tuesday night, starting when the first polls close at 7:30 PM ET. Join us for our complete coverage!