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Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick shake hands after a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick shake hands after a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Republican David McCormick, right, and Sen. Bob Casey, D-Pa., take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Republican David McCormick, right, and Sen. Bob Casey, D-Pa., take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Republican David McCormick, right, and Sen. Bob Casey, D-Pa., take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Republican David McCormick, right, and Sen. Bob Casey, D-Pa., take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Republican David McCormick takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidates Sen. Bob Casey, D-Pa., left, and Republican David McCormick take part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)

Pennsylvania Senate candidate Sen. Bob Casey, D-Pa., takes part in a debate at the WPVI-TV studio, Tuesday, Oct. 15, 2024, in Philadelphia. (AP Photo/Matt Rourke)