From border security to nuclear energy, the candidates turned almost every question thrown at them into an opportunity to drive home their narratives about each other.

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,

Democratic Sen. Bob Casey went head-to-head with Republican Dave McCormick in a bitter first debate that reflected the close nature and high stakes of the race