Five states hold primaries Tuesday: Arizona, Kansas, Michigan, Missouri and Washington.

In Washington, two Republicans who voted to impeach then-President Donald Trump in the wake of the Capitol insurrection are aiming to fend off primary opponents.

Washington's top-two primary system puts all candidates on one ballot and advances the top two vote-getters to the general election, regardless of party.

Washington is mostly an all-mail-voting state, and polls close at 8 p.m. PT, or 11 p.m. ET.

Copyright 2022 NPR. To see more, visit https://www.npr.org.