As expected, given that both were unopposed, ABC News has projected that both Republican David McCormick and Democratic Sen. Bob Casey will win their respective primaries and advance to the general election for Pennsylvania's U.S. Senate seat this November. Casey starts out with a slight advantage in both fundraising and the polls, but most analysts are still predicting a tight race.

—Cooper Burton, 538

In Pennsylvania's 10th District, where several Democrats were in today’s primary, former evening news anchor Janelle Stelson is currently leading with 48 percent of the expected vote in. Stelson has backing from EMILY’s List, which is historically a good sign. According to our analysis of the 2022 primaries, 85 percent of candidates endorsed by EMILY’s List’s in open primaries won their races. Interestingly, three candidates in open primaries endorsed by EMILY's List in California did not advance to the general election, which will bring down their success rate. But we'll need to wait and see how EMILY's List candidates do overall this cycle.

—Meredith Conroy, 538 contributor

As I mentioned earlier, I'm tracking how anti-abortion Republicans are doing tonight. As Mary said, most Pennsylvanians support legal abortion, and it's shaping up to be a big issue in November. Three of the races I'm tracking are uncontested, and so we already have projected winners. Two incumbents, Rep. Scott Perry, who has six Democrats running to face off against him, and Lloyd Smucker, whose Democratic opponent pilot Jim Atkinson is also uncontested in the primary, are among the group. Aaron Bashir, a mathematics teacher at a community college and accountant for the city of Philadelphia, is the only Republican running to face off against incumbent Democrat Brendan Davis in the fall. He lost against Davis in 2022.

—Monica Potts, 538

In the 10th District around Harrisburg, we now have early votes in from across all three counties in the district, representing almost half of the expected primary vote. This race doesn't look particularly close, either, as Stelson leads with 46 percent, followed by O'Brien with 21 percent and Daniels 13 percent. Hard to see Stelson losing that kind of edge at this point. The winner will face Rep. Scott Perry, the former House Freedom Caucus chair.

—Geoffrey Skelley, 538

Happy primary day to those who celebrate! (That's us, fellow Pennsyvlanians.)

The Keystone State is already in the public eye this election cycle, as it's expected to be a battleground state for both the presidential race and a critical U.S. Senate race between incumbent Democratic Sen. Bob Casey and Republican David McCormick. And there are consequential races down the ballot, too: Several competitive U.S. House races could impact the balance of the House majority, while Democrats are hoping to compete for control of both chambers of the state legislature to earn their first state government trifecta in more than 30 years.

And while the candidates for president and Senate are set, today's primary contests will determine just who's on the ballot from each party in those key down ballot races. Tonight, we're closely tracking a handful of significant U.S. House races, including progressive Rep. Summer Lee's bid to hold off a more moderate challenger; moderate Republican Rep. Brian Fitzpatrick's challenge from the hard right; and a three-way GOP primary to decide who will face off against Rep. Susan Wild in one of the most competitive House races this fall. We've also got our eyes on some hotly contested primary contests for statewide offices like attorney general and a number of spicy state legislative races.

As usual, we'll be here to guide you through it all with the latest results and analysis throughout the evening. We should start seeing results come in shortly after polls close at 8 p.m. Eastern. Thanks for joining us!

—Tia Yang, 538