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

I wrote earlier about some of the races for state House. So far, it looks like state Rep. Brown, in West Philadelphia, and state Rep. Salisbury, in the Pittsburgh area, are fending off challenges from the left, according to The New York Times. In the Brown race, Blackwell and Green may have split the vote against him. In the Democratic race for state Senate in Erie, Erie County Democratic Party Chair Jim Wertz is projected to defeat former Fetterman staffer Selena King, according to The New York Times.

—Monica Potts, 538

Pennsylvanians will technically pick their nominees today for the state's U.S. Senate election this fall, though the results won't be a nail-biter — both major party candidates are running unopposed in their primaries. Democratic Sen. Bob Casey Jr. is running for a fourth term, while David McCormick, a former hedge fund CEO and diplomat under the Bush administration, is hoping to claim the seat for Republicans.

While today's primary isn't competitive, the general election matchup is already attracting a lot of attention. Democrats currently have just a one-seat majority in the Senate and are defending at least seven competitive seats this cycle, including Casey's in Pennsylvania. That means control of the chamber could come down to the Keystone State, a prospect that both parties are taking seriously.

Both candidates have already dropped millions of dollars on the race. While McCormick slightly outraised his opponent last quarter, Casey has spent over two and a half times as much money this cycle and has close to twice as much cash on hand as McCormick.

Casey also leads in every poll we've collected of the race, although some of those leads are within the margin of error. All the major election handicappers agree that he appears to have an edge in the race for now, though it's still competitive enough that things could easily change by November. Tonight won't be able to tell us much about the future, but it marks the official start to one of the most closely watched matchups this cycle.

—Cooper Burton, 538