Bob Casey

Bob Casey Jr. was Pennsylvania Democratic politics in the Senate for nearly two decades. The son of Governor Bob Casey Sr. — a Democrat who served as Pennsylvania governor from 1987 to 1995 and who was best known nationally for his anti-abortion-rights position that caused a famous confrontation with the national Democratic Party — Casey built his political identity around a similar willingness to hold positions that didn't fit neatly into national Democratic orthodoxy. That independence, combined with the Casey family name's deep roots in northeastern Pennsylvania's working-class Catholic communities, made him one of the most durable Democrats in a state that had been drifting toward Republicans at the presidential level since 2004.

His 2006 win over Rick Santorum was a genuine landslide — 59-41% — in a year that was devastating for Republicans nationally. He won re-election in 2012 and 2018 with comfortable margins, surviving the 2010 and 2014 Republican waves that wiped out Democrats across the country. His survival formula was consistent: run as a practical, constituent-focused senator who put Pennsylvania workers first; avoid national progressive branding; emphasize healthcare, disability rights, and manufacturing; and leverage the combination of the Casey name in blue-collar Pennsylvania and strong Democratic performance in Philadelphia and its suburbs.

By 2024, that formula faced structural challenges it couldn't fully overcome. Pennsylvania had moved right in working-class areas faster and further than Casey's coalition could absorb. Donald Trump's second presidential campaign generated exceptional turnout in rural and exurban Pennsylvania that overwhelmed even Casey's personal advantages in those communities. McCormick ran as a disciplined, well-funded candidate who avoided the controversies that had sunk Mehmet Oz in 2022. The result — Casey lost by roughly 16,000 votes out of more than 6.5 million cast — was among the closest Pennsylvania Senate results in modern history, but it ended a dynasty.

The 2024 Pennsylvania Senate majority was one of the most closely watched of the cycle, and its outcome surprised most analysts. Casey had been expected to survive based on his personal brand, his three-term incumbency advantage, and Pennsylvania's history of supporting him even in difficult Democratic years. McCormick had run a poor 2022 primary campaign against Mehmet Oz and was seen as a flawed general-election candidate — a Connecticut-born hedge fund executive whose ties to China through Bridgewater Associates seemed tailor-made for Democratic attack ads.

What changed: McCormick ran a disciplined second campaign, neutralized the China attacks with preemptive messaging, and benefited from an exceptional Trump turnout operation in rural Pennsylvania that produced margins the state's Democratic metro areas couldn't fully overcome. Casey's campaign raised enormous sums — over $50 million — but couldn't fully separate him from Kamala Harris's underperformance in the state. The 16,000-vote margin was close enough that it will be studied for years as a case where a few thousand votes in key counties determined whether a well-regarded three-term senator continued or a dynasty ended. It ended.