(The Center Square) — If Pennsylvania voters weren’t sick of political attack ads, Thursday night’s U.S. Senate debate between Democrat Bob Casey and Republican Dave McCormick was an absolute feast. The hour-long debate was a director’s cut of barbs back and forth between the Democratic incumbent and the Republican challenging trying to unseat him. If viewers missed the few moments where a substantive policy discussion took place, they could be forgiven. Casey accused McCormick of “lifting up (America’s) adversaries” through his investments when he served as CEO of hedge fund Bridgewater Assoc…