Democratic U.S. Sen. Bob Casey of Pennsylvania and Republican challenger David McCormick met Thursday for their first debate in the pivotal race for a swing-state seat, with each candidate repeatedly accusing the other of lying and turning questions about energy,

Sen. Bob Casey and challenger Dave McCormick each tried to paint the other as weak and dishonest during the hourlong debate.

I'm the underdog,” David McCormick told NewsNation’s Leland Vittert in a one-on-one interview for “On Balance.”