HARRISBURG, Pa. — Pennsylvania’s U.S. Senate race between three-term Democratic Sen. Bob Casey and Republican challenger David McCormick will help determine control of the chamber Tuesday in a battleground state contest that is one of the most expensive this year.

Casey, perhaps Pennsylvania’s best-known politician and the son of a former two-term governor, is seeking a fourth term after facing what he called his toughest re-election challenge yet. Casey, 64, is a stalwart of the state Democratic Party who has won six statewide elections since 1996, including as state auditor general and treasurer.

McCormick, 59, is making his second bid for the Senate after losing to Dr. Mehmet Oz in the 2022 Republican primary. He left his job as CEO of the world’s largest hedge fund to was running after serving at the highest levels of former President George W. Bush’s administration and serving on Trump’s Defense Advisory Council.

The race ran on national issues, from abortion rights to inflation. But he also turned on local ones, such as Casey’s accusation that McCormick is a rich carpetbagger from Connecticut’s posh “Gold Coast”—a caricature McCormick helped bring to life by mispronouncing the name of one of local Pennsylvania beers – trying to buy Pennsylvania beers. Senate seat.

Casey also attacked McCormick’s hedge fund days, accusing him of enriching himself at America’s expense by investing in Chinese companies that make fentanyl and build Beijing’s military.

McCormick, for his part, emphasized his seventh-generation Pennsylvania roots, talked about his high school days wrestling in northern Pennsylvania towns — a sport that took him to the U.S. military academy at West Point — and his time in the management of the online auction house FreeMarkets Inc. ., who had his name on a Pittsburgh skyscraper during the tech boom.

Casey, a staunch ally of unions and President Joe Biden, has campaigned to preserve the middle class, abortion rights, labor rights and voting rights, calling McCormick and former President Donald Trump a threat to all of them.

McCormick, in turn, accused Casey of rubber-stamping the Biden administration’s policies on the border, the economy, energy and national security that he blames for inflation, domestic unrest and war. He attacked Casey as a weak, out-of-touch career politician and a sure bet that she would be in line with Vice President Kamala Harris if she became president.

Democrats currently hold a majority in the Senate by the narrowest of margins.

Both Casey and McCormick were uncontested for their party’s nominations in the primary election.

Also on the Nov. 5 Senate vote are John Thomas of the Libertarian Party, Leila Hazou of the Green Party and Marty Selker of the Constitution Party.