Democratic Rep. Shri Thanedar faces a primary challenge in the Detroit-based 13th District — although not the one many expected. Thanedar, who is Indian American, won an open-seat race in this plurality-Black and solidly blue district in 2022, edging out then-state Sen. Adam Hollier thanks in part to a crowded primary field. As a result, the city of Detroit has no Black member of Congress for the first time since the early 1950s, which — along with criticisms about his professionalism in office — has helped prompt opposition to Thanedar among some in Detroit's Black community and the Congressional Black Caucus. However, while Hollier was set to challenge Thanedar in 2024, he failed to make the primary ballot due to invalid signatures, leaving Detroit City Council member Mary Waters as Thanedar's main opponent.

Hollier's absence has put Thanedar in the driver's seat for renomination. Personally wealthy, the incumbent has self-funded much of the $7.1 million that he's raised, putting him light years ahead of Waters's $153,000. On top of this, outside groups have come in big for Thanedar, whether directly or indirectly. Pro-cryptocurrency group Protect Progress has spent $1.0 million to back him while Blue Wave Action, which has unclear ties, has spent $2.3 million to, er, muddy the waters. BWA has attacked Waters as corrupt, pointing to an influence-peddling scheme that resulted in a one-year probation for her. But BWA has also promoted the third (and minor) candidate in the race, which could potentially help split the anti-Thanedar vote. Waters's campaign has accused BWA of being in cahoots with Thanedar, although there's no evidence — and the group won't have to file information about its donors until after the primary.

—Geoffrey Skelley, 538

The nonpartisan blanket primary race for governor has attracted no fewer than 28 candidates, after Democratic Washington Gov. (and one-time presidential candidate, remember that?) Jay Inslee announced last year that he would not seek reelection to a fourth term in office. However, very few of them have a shot of making one of the top two slots to advance to the November ballot.

The front-runner among Democrats appears to be Democrat Bob Ferguson, Washington's attorney general, currently in his third term (not to be confused with two other Bob Fergusons who had been running at the behest of a Republican activist, but later dropped out). Ferguson is leading the pack on fundraising, having raised close to $9 million according to the most recent financial disclosures, and has been getting plenty of support from state party leaders, including an endorsement from Inslee, though the party hasn't officially endorsed anyone. He does have some Democratic competition from Washington state Sen. Mark Mullet, though Mullet has struggled to get as much traction as the AG, and trails him in fundraising.

Another top contender is Republican Dave Reichert, a former member of Congress and former sheriff of King County — the most populous county in the state and home to Seattle. Reichert has raised the second-most funds of any candidate, with over $4.4 million. During his seven terms in Congress, he was a moderate with a record of being a consensus builder who wasn't afraid to buck the party line. That could serve him well in the Evergreen State, which hasn't had a Republican governor since the 1980s. Like Ferguson, Reichert is also facing some competition from within his own party — Semi Bird, a former Green Beret who made headlines when, as a member of the Richland School Board, he voted to overturn a mask mandate during the pandemic, in violation of state guidelines. Polls in this race show Reichert and Ferguson are likely to take the top two slots and be on the ballot in November, setting up a tight race between them for the governor's mansion.

—Kaleigh Rogers, 538

Democrats have a contested primary in the 10th District, a swingy seat held by Republican Rep. John James that covers much of Macomb County. In 2022, James defeated former Macomb County judge Carl Marlinga by only 0.5 points, and Marlinga is back for another go. Considering Marlinga has been around Macomb County politics and law for decades, the 77-year old may be favored in the Democratic primary. However, he's only raised $627,000, putting him just ahead of financial adviser Diane Young ($526,000) and gun safety activist Emily Busch ($481,000).

Most strikingly, Busch has run an ad in which she disclosed having had an abortion and claimed that Marlinga once tried to prevent a 12-year-old rape victim from receiving one. Marlinga has defended his record on abortion, saying that he only delayed action in that court case so the victim could first receive a psychological evaluation. Notably, attempts to portray Marlinga as insufficiently favorable toward abortion rights didn't work in the 2022 Democratic primary, which he won comfortably. State Board of Education Co-Vice President Tiffany Tilley is also in the race, although she's only raised $63,000.

—Geoffrey Skelley, 538

According to the Center for American Women in Politics, just 25 percent of Senators and 29 percent of House members are women. As usual, we're keeping track of the women on the ballot today who are looking to add to those numbers.

Both in Congress and on tonight's ballots, most of those women are Democrats:

Two key races where Democratic women are favored tonight are in Michigan. Democrats have an open primary in the state's purple 8th District, where incumbent Rep. Dan Kildee announced he would not seek reelection. EMILYs List is backing state Sen. Kristen McDonald Rivet; the seat is rated as a toss-up in November by Larry Sabato's Crystal Ball. Michigan's Senate race is also expected to be close, after Sen. Debbie Stabenow announced she would not seek reelection for the seat she's held since 2001. EMILYs List is also getting involved here, backing Rep. Elissa Slotkin (who currently represents the 7th District) in the primary, hoping to keep that seat not only blue, but represented by a woman.

A slate of women are also running in GOP primaries tonight, though fewer are favored to win:

GOP women's groups have backed their own candidate for Kildee's open 8th District seat. GOP women's groups VIEW PAC and Winning for Women are supporting Mary Draves, a former executive at Dow Chemical; but she's got an uphill battle in her primary, because Trump has endorsed Paul Junge, who lost to Kildee in 2022.

In Kansas, there could be a competitive Republican primary in the 3rd District, in a race to face off against the incumbent Democrat, Rep. Sharice Davids. VIEW PAC is backing small business owner Karen Crnkovich. However, the NRCC and party brass have lined up behind physician Prasanth Reddy.

It's a similar story in Washington's 3rd District, where Republicans are hoping to challenge Democratic Rep. Marie Gluesenkamp Perez, who eked out a win in 2022 against former Green Beret Joe Kent. (That year, Kent rode Trump's endorsement in the primary to finish ahead of then-incumbent Republican Rep. Jaime Herrera Beutler, who had voted to impeach Trump). Kent is back, again with Trump's endorsement, though GOP women's groups VIEW PAC, Maggie's List, and Winning for Women are backing Leslie Lewallen, a former King County prosecutor.

Washington's 5th District is currently represented by a Republican woman, Rep. Cathy McMorris Rodgers, who is not seeking reelection. VIEW PAC and Maggie's List are backing state Rep. Jaquelin Maycumber in the hopes of keeping the seat in the hands of a GOP woman. But in a crowded primary for the open seat, she faces tough competition, particularly from Spokane County Treasurer and former state Sen. Michael Baumgartner.

I'll be watching these races (and more) today.

—Meredith Conroy, 538 contributor