Pennsylvania Sen. Bob Casey (D) is leading by 9 points in his Senate reelection bid against Republican challenger David McCormick, a new survey found. The UMass Lowell/YouGov poll found Casey

The battle for Pennsylvania’s 19 electoral votes may garner the most headlines nationwide, but the race for its U.S. Senate seat may determine whether Democrats will retain control of the upper chamber,

Democratic U.S. Sen. Bob Casey and Republican challenger David McCormick disagreed on clean energy policy, gun laws and abortion rights in a fast-moving debate Tuesday night, as they accused each other of lying and shared a stage for the last time before the election.

Democratic U.S. Sen. Bob Casey of Pennsylvania and Republican challenger David McCormick meet for their second debate Tuesday evening, with control of the Senate on the line and tens of millions of dollars pouring into the race every week.