As I mentioned earlier, only two Republican women are running in House races today, compared to 15 Democratic women. And only one woman, Maria Montero in the 7th, is running in a seat where the party could be competitive in November. Pennsylvania has slightly below average female representation in their state legislature (which is just 32 percent female), and they've never had a female U.S. senator or governor (of any party). A state's history of electing women to political office is actually a pretty good predictor of electing more women in the future. Research indicates that once a state has elected a woman to a particular office, future female candidates are more likely to be successful in seeking that same office. Experts suggest this is due to increased familiarity and acceptance of women in political leadership and the establishment of support networks and resources for female candidates.

ABC hasn't made a projection in Montero's race yet, but The Associated Press has already projected it for state Rep. Ryan Mackenzie. Per the latest results, with 50 percent of the expected vote reporting, Montero trails, with 28 percent of the vote to Mackenzie's 43 percent and business owner Kevin Dellicker's 30 percent.

—Meredith Conroy, 538 contributor

ABC News reports that Janelle Stelson is projected to win the Democratic nomination in Pennsylvania's 10th District. With 63 percent of the expected vote reporting, she leads with 44 percent, well ahead of Mike O'Brien's 23 percent in second place. Stelson will advance to the general election to face Rep. Scott Perry, who has arguably the most conservative voting record of any Republican who represents a seat that Trump would've won by less than 5 points in 2020 or that Biden would've carried. However, the GOP starts out as favorites for the general election, as ratings outlets view it as a Lean Republican seat.

—Geoffrey Skelley, 538

ABC News reports that progressive Philadelphia State Rep. Malcom Kenyatta is projected to win in the Democratic Auditor General primary. He's currently ahead of Mark Pinsley by around 23 percentage points, a significant improvement from the last time he appeared on a statewide primary ballot, winning just 11 percent of the vote in the 2022 Senate primary. He will face Republican incumbent Timothy DeFoor in November, who ran unopposed today.

—Mary Radcliffe, 538

ABC News reports that Rep. Brian Fitzpatrick is projected to win the GOP primary in the 1st District, conquering his right-flank challenge from anti-abortion activist Mark Houck. He's faced a primary challenger in every election since he was first elected in 2016, but has always triumphed. Fitzpatrick will once again go up against Democrat Ashley Ehasz this fall, whom he beat by 10 points in 2022.

—Kaleigh Rogers, 538

In tonight's primaries, voters aren't just deciding on federal candidates for November's general election; they're also setting up the battles for control of the state House and Senate. In 2022, Democrats won the governorship, and they currently hold a one-vote majority in the House they've struggled to maintain through a series of special elections. The party is looking to expand that House majority and gain control of the Senate for a trifecta by targeting opportunities (and defending some vulnerable seats) in the purple areas of this purple state. And, of course, Republicans want to keep their Senate majority, which they've held for 30 years, and take back the House.

Republicans have a six-vote majority in the state Senate, so Democrats need to pick up at least three seats for a tie, which could be broken by Democratic Lt. Gov. Austin Davis. Half the chamber is up for election this cycle. Among the handful of key races, Democrats will be defending an Allegheny County seat and challenging Republicans for a Harrisburg-based seat that are both opening up because of retirements. In both districts, each party is holding a contested primary today and redistricting could give Democrats a boost in November. Democrats are also challenging Republican incumbents in two seats that flipped to red in 2016 and 2020; one will hold a competitive Democratic primary today between Erie County Democratic Party Chair Jim Wertz and former Sen. John Fetterman staffer Selena King.

In the House, the hot primary action will largely be on the Democratic side, as the party's more progressive and centrist flanks face off in districts around Philadelphia and Pittsburgh. In West Philadelphia, Rep. Amen Brown is defending his seat against two challengers, Sajda Blackwell, whose family has a history in area politics, and progressive community activist Cass Green. Brown ran unsuccessfully for mayor on a tough-on-crime stance, and has sided with Republicans in criticizing progressive Philly DA Larry Krasner. Elsewhere in the city, three incumbents endorsed by progressive group Reclaim Philadelphia are facing challengers of their own. And in the Pittsburgh area, state Rep. Abigail Salisbury, who stepped into U.S. Rep. Summer Lee's former seat, is facing a challenge from Ashley Comans, a progressive school board member who lost to Salisbury last year and is endorsed by Lee herself.

Tonight's results will have an effect on their party's chances to hold onto the state House majority in November, and also the direction the Democratic party may try to take should it seize a trifecta.

—Monica Potts, 538