Republican David McCormick has won Pennsylvania’s pivotal U.S. Senate seat, beating three-term Democratic Sen. Bob Casey.

Republican Dave McCormick, an Army veteran and former hedge fund CEO, has unseated three-term Democratic incumbent Bob Casey Jr. in Pennsylvania’s nationally watched U.S. Senate race, according to The Associated Press.

Pennsylvania saw one of the most expensive Senate races in the country this cycle — and McCormick had early backing from national Republican operatives during the state’s GOP primaries. But Casey has deep ties in Pennsylvania,