Pennsylvania's Senator Bob Casey seeks fourth term amidst GOP opposition.

The National Republican Senatorial Committee (NRSC) launched a digital attack ad against Democratic Senator Bob Casey of Pennsylvania, who announced his 2024 re-election campaign seeking a fourth six-year term. Republicans view Casey as vulnerable and aim to flip a Senate seat in the Keystone state. The digital ad labels the senator "shady" and spotlights what it claims are his connections to "scandal after scandal." The NRSC is courting Dave McCormick to take on Casey, who narrowly lost to Mehmet Oz in last year’s GOP Senate primary by less than 1,000 votes. Former state Sen. Doug Mastriano, a far-right Trump loyalist, is also mulling a bid.