Three-quarters of a million Pennsylvanians may be denied a chance to vote in November unless they can come up with an acceptable form of identification, a tally released by the state suggests. In a move lawmakers said would deter fraud at the polls, the Republican-led Legislature passed a law in March requiring voters to have a photo ID to obtain a ballot. A comparison of registration lists and state Transportation Department records showed 758,939 people don’t have either a driver’s license or an alternative state ID, the secretary of the commonwealth said.