As Geoffrey just mentioned, Summer Lee is leading her primary challenger, Bhavini Patel, in the 12th District. Political science research actually finds that incumbent women in Congress are more likely to face challengers than incumbent men. This is due to several factors, such as a history of women's underrepresentation which gives the impression that female incumbents are more vulnerable; this leads to higher quality challengers, too.

—Meredith Conroy, 538 contributor

The three Republicans running for the chance to defeat Rep. Susan Wild in Pennsylvania's competitive 7th District are all anti-abortion. With 26 percent of the expected vote in, state Rep. Ryan Mackenzie has a lead with 42 percent of the vote. Mackenzie has told a local news station that the issue is best left to the states because there's no consensus at the federal level. In Pennsylvania, he's voted for a constitutional amendment saying there's no right to taxpayer-funded abortions.

—Monica Potts, 538

Lee now leads Patel 57 percent to 43 percent in Pennsylvania's 12th District Democratic primary, with 57 percent of the expected vote reporting. Allegheny County has begun reporting votes cast on Election Day (that is, not early or by mail), and Lee is winning about 3 in 4 of those votes so far. That edge may not last, but considering Lee leads 55 percent to 45 percent among the early and mail votes, she doesn't need much to hold her lead. A Patel comeback looks quite unlikely. In fact, Decision Desk HQ projected the race for Lee a few minutes ago. We're still waiting for a projection from ABC, though.

—Geoffrey Skelley, 538

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 the Harrisburg-based 10th District, Republican Rep. Scott Perry won reelection by a little less than 8 percentage points in 2022. But he remains a target for Democrats, thanks to the district's potential competitiveness and Perry's reputation as an archconservative. A crowd of six contenders have entered the Democratic primary to earn the right to face Perry in November, and there's some degree of uncertainty about how this primary might play out.

If there's a front-runner, it's probably former news anchor Janelle Stelson, whose long tenure at WGAL in the Harrisburg-Lancaster-Lebanon-York TV market has made her a familiar face in the region. Stelson had raised $577,000 as of April 3, and she has endorsements from EMILY's List and the business-friendly New Democratic Action Fund. However, Stelson has competition in retired Marine fighter pilot Mike O'Brien, who has slightly outraised Stelson by bringing in $736,000. The other candidate of note is Harrisburg City Council member Shamaine Daniels, the party's 2022 nominee against Perry, although she's only raised $73,000.

But both Stelson and O'Brien have faced questions about their ties to the district, as Stelson lives just outside it in Lancaster County and O'Brien only recently moved to the area. Stelson has also faced scrutiny for having only recently switched her party registration from Republican to Democrat and for having made a racist joke on air around a decade ago involving Asians eating cats. Whether that's enough to derail her remains to be seen: The only recent poll we've seen was a late February survey for Stelson's campaign by Normington, Petts & Associates that found her leading with 36 percent, followed by Daniels at 16 percent and O'Brien at 9 percent.

—Geoffrey Skelley, 538