The Lehigh Valley, around Allentown in eastern Pennsylvania, is the backdrop to what is set to be one of the most competitive House races in the state (and the nation) this fall: the 7th District. Democratic Rep. Susan Wild will be squaring off against one of three Republicans vying to challenge the three-term congresswoman. In 2022, Wild held onto her seat by just 2 points in this competitive district, and Republicans are hoping they can finally flip it. Razor-thin races like this will help determine if the GOP can maintain control of the House.

The three Republicans battling it out in the GOP primary are Kevin Dellicker, a consulting company owner who was the runner-up in the 2022 primary, attorney Maria Montero, and state Rep. Ryan Mackenzie, a local boy who has represented the region in the general assembly since 2012. Dellicker has outraised his opponents by about double, according to recent FEC filings, bringing in $447,000 to Mackenzie's $272,000 and Montero's $214,000. But Mackenzie has received substantial outside support to the tune of almost half a million dollars from Americans for Prosperity Action, a libertarian super PAC founded by the Koch brothers. There's no polling available for this race and not a ton of daylight between the three candidates when it comes to policy positions on hot-button issues like immigration, abortion and climate change, so it could be anyone's race. However, the heavy spending on Mackenzie's campaign and his local name recognition are distinct advantages.

—Kaleigh Rogers, 538

According to a Beacon Research/Shaw & Co. Research/Fox News poll released last week, a plurality, 40 percent, of Pennsylvania voters feel that the Biden administration has been about right in its support for both the Israelis and Palestinians. Twenty-four percent said the administration has been too supportive of the Israelis, and a similar 23 percent said it has been too supportive of the Palestinians.

—Mary Radcliffe, 538

The war between Israel and Hamas in Gaza has paved the way for some bitter Democratic primary fights in 2024. Among those most critical of Israel's actions in the conflict has been The Squad, an informal group of around nine progressive Democrats who often clash with their party's establishment. Of that cohort, Rep. Summer Lee of Pittsburgh is the first to face a contested primary in 2024 — but she won't be the last. At least four members, including Lee, have potentially significant primary opposition in part because of their vocal denouncements of Israel — although increasingly negative views of the Middle East nation's actions among the Democratic base means the conflict may not be as helpful to The Squad's challengers as some may have expected.

Should Lee survive, she would join Reps. Greg Casar of Texas and Delia Ramirez of Illinois among those who've won renomination (Casar and Ramirez faced no opposition in their March primaries). But some members with primaries later this summer may have problems, especially the two who are arguably most endangered: New York Rep. Jamaal Bowman and Missouri Rep. Cori Bush. For one thing, they've each been outraised by their leading challengers, and they both have potential scandals that could derail their reelection efforts. Last fall, Bowman pulled a fire alarm in a Capitol office building right before a vote, which resulted in him paying a fine and receiving a censure from the House. And Bush faces investigations by the Department of Justice, Federal Election Commission and House Ethics Committee into alleged misuse of funds to pay her security team, including payments to her husband as part of that team.

Beyond those two, Minnesota Rep. Ilhan Omar may be the other Squad member who could have some trouble. Two years ago, she defeated former Minneapolis City Council member Don Samuels by just 2 percentage points in the Democratic primary; now Samuels is back for a rematch, although Omar has already raised more than twice as much as the $2.4 million she'd brought in by the time of the 2022 primary>. Otherwise, there are few signs that New York Rep. Alexandria Ocasio-Cortez, Michigan Rep. Rashida Tlaib and Massachusetts Rep. Ayanna Pressley will have difficulties. Ocasio-Cortez does have a challenger, but his largely self-funded effort pales in comparison to Ocasio-Cortez's campaign war chest, while Tlaib's little-known opponents only just filed for the race and haven't reported raising any money. Pressley, meanwhile, has no primary opposition ahead of Massachusetts's May 7 candidate filing deadline.

—Geoffrey Skelley, 538

One of the most competitive races today could be the Democratic contest for the open state attorney general, where Pennsylvania voters have a full slate of five candidates to pick from. It seems to be anyone's contest here, with each candidate bringing endorsements and support from different Democratic factions to the table.

The fundraising leader in this race is Northeast Philadelphia State Rep. Jared Solomon, a veteran who's emphasized anti-corruption and public safety on the campaign trail and in the state legislature. But his good-government bent hasn't seemed to win him friends in the party — he came in last in balloting for the Democratic Party endorsement (which no candidate ended up winning). The next biggest fundraising numbers came from Delaware County DA Jack Stollseimer and former Bucks County Solicitor Joe Khan, who previously served as a prosecutor in Philadelphia.

But there are two other candidates who may have other advantages in their pockets: The top vote-getter in the inconclusive party endorsement contest was Eugene DePasquale, who likely has a name recognition advantage. A Pittsburgh native, he represented York County as a state rep before winning statewide office as auditor general, and he's the only candidate from Western Pennsylvania. Meanwhile, the most progressive candidate in the race is likely Keir Bradford-Grey, a former chief public defender in both Montgomery County and Philadelphia. She's backed by the progressive Working Families Party and is looking to become the state's first Black AG, and the first AG in the country with a background primarily as a public defender. Her showing could tell us something about Pennsylvania Democrats' mood at a time when progressive prosecutors like Philadelphia DA Larry Krasner have come under increased scrutiny.

Whoever wins will be gearing up for a competitive general election, where they'll face the winner of today's GOP primary between York County DA David Sunday, who has his party's endorsement, and state Rep. Craig Williams, another veteran who represents parts of Chester and Delaware Counties and served as the chamber's impeachment manager against Krasner last year.

Further down the ballot, Democrats are also choosing their candidates today to challenge incumbent Republicans for two other statewide posts. In the Democratic primary for auditor general, the state's top fiscal watchdog, progressive Philadelphia state Rep. Malcolm Kenyatta earned the party nod, and is likely favored over Lehigh County Controller Mark Pinsley. For state treasurer, Erie state Rep. Ryan Bizzarro is similarly favored over Pittsburgh-area small business owner Erin McClelland. These races are expected to be highly competitive in November too: They were each decided by just a few percentage points in 2020, and Democrats have set their sights on reversing the results this time around.

—Tia Yang, 538

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