With 14 percent of the expected vote reporting in the Republican primary for West Virginia governor, Morrisey leads Capito 35 percent to 30 percent. Meanwhile, Warner (18 percent) and Miller (14 percent) are further back.

—Nathaniel Rakich, 538

For a few cycles now, 538 has been eyeing the relationship between the Democratic Party and its progressive wing by tracking primary endorsements from progressive groups. One progressive we've been watching for several cycles is Sen. Bernie Sanders. In 2018, capitalizing on the momentum gained from his 2016 Democratic primary, he became a real player when it came to elevating progressive candidates. That cycle, he endorsed in nine open primaries, but only five of whom won. In 2020, he endorsed in eight open primaries, six of whom won, and in 2022 he endorsed in ten primaries, eight of whom won.

In short, his endorsees are doing a little better, each cycle. Today's primaries marks his first open primary endorsement of the cycle — John Morse, a labor attorney, running in the very crowded Maryland's 3rd.

—Meredith Conroy, 538 contributor

With 14 percent of the expected vote reporting, West Virginia Governor Jim Justice looks headed for an easy defeat of U.S. House Rep. Alex Mooney in the race to be the GOP nominee for Senator from West Virginia. Mooney currently leads Justice only in Jefferson and Berkeley Counties in the Northeastern panhandle of the state — an area with a lot of exurban communities of the Washington, DC, metro area. Our polling average for the race had Justice ahead of Mooney by 34 percentage points. He is currently up by 29 points, 59 percent to 30 percent, though of course it is still early in the night.

On the Democratic side, coal executive Don Blankenship currently trails his competition with 16 percent of the vote, and 10 percent of the expected vote reporting. Glenn Elliott, the mayor of Wheeling, West Virginia, holds a sizable lead over Zachary Shrewsbury, a Marine Corps veteran, though again it's too early to call a winner in that race too.

—G. Elliott Morris, 538

Nathaniel, in 2018 Blankenship won just four counties in the GOP primary. One of them was Mingo County, on the state's southern edge and Blankenship's home base. He won it with 45 percent of the vote in 2018, and in 2024 it's the only county he's carrying so far, with about 52 percent of the vote. Mingo was once staunchly Democratic but has zoomed rightward, as has most of the state. In 2004, John Kerry carried over George W. Bush by 13 percent. In 2020, Biden only won 13 percent of the vote!

—Jacob Rubashkin, Inside Elections

It's going to be a minute before we start to get primary results this evening, so allow me to make a humble suggestion in the meantime: Listen to the 538 Politics podcast!

Yesterday I sat down with my colleagues Nathaniel and Geoffrey and friend of the pod Leah Askarinam to talk about the recent The New York Times/Siena College swing-state polls and preview tonight's races. In case you missed it, the polling was pretty bad for President Joe Biden. He trailed former President Donald Trump in every battleground state except Wisconsin and lagged by 12 percentage points in Nevada.

But there are some caveats in understanding what those polls mean at this point in the cycle. Most importantly, it's less that Trump has picked up ground than that Biden has lost it, and a big question over the next five and a half months will be whether Biden can gain that support back. There's a lot more to say, but I'll let you listen to find out!

As far as tonight's races go, we mainly focused on the important Democratic Senate primary in Maryland, where things are looking truly competitive. We also hit on a couple of House primaries that feature people who were in the Capitol on Jan. 6, 2021 — one Capitol police officer and one Trump supporter. Check it out!

—Galen Druke, 538