In a fiery first debate for Pennsylvania's pivotal U.S. Senate race, incumbent Democratic Senator Bob Casey and GOP challenger David McCormick engaged in sharp exchanges, trading accusations and well-worn lines on various issues including immigration, economy, and foreign policy. Both candidates sought to underscore their positions, with Casey defending his record while McCormick positioned himself as the underdog. Analysts noted that while the debate was lengthy on attacks, it lacked substantive policy discussions. Voters are now left to ponder who emerged victorious, as polls and public opinion weigh in on the candidates' performances.