Democratic Sen. Bob Casey and Republican challenger David McCormick will face each other in Pennsylvania’s high-stakes U.S. Senate contest this fall. Tuesday’s primary election put the men on track for an expensive race that's expected to help decide Senate control in the Nov. 5 election. Casey is seeking a fourth term, while McCormick is a two-time Senate challenger and a former hedge fund CEO who lost narrowly in 2022’s seven-way GOP primary. McCormick’s candidacy is shaping up as Casey's strongest challenge in his three reelection bids. President Joe Biden and former President Donald Trump won their parties' nominations easily.