HARRISBURG (AP) – Some of PA’s largest counties are working to help voters fix mail-in ballots that have fatal flaws such as incorrect dates or lack of signatures on the envelopes used to send them in. The efforts by elections officials in Philadelphia and Pittsburgh are in response to state Supreme Court orders that said mail-in ballots may not be counted if they lack accurate handwritten dates on the exterior envelopes. It’s unclear how many ballots are at issue across the state. Democrats are far more likely than Republicans to vote by mail. The numbers of mail-in ballots are large enough that they might matter in close races.