WASHINGTON (AP) — Pennsylvania’s Senate contest between Democratic incumbent Bob Casey and Republican challenger David McCormick is still too early to call. McCormick has a roughly 31,000-vote lead, which has been dwindling as outstanding votes continue to be counted. The roughly half-percentage-point margin between the candidates also qualifies the race for an automatic recount. McCormick overtook Casey with about 80% of the estimated votes counted just before midnight on Tuesday. Casey initially had a lead over McCormick when just about 40% of the estimated votes had been counted, propelled in part by mailed ballots that have historically favored Democrats. McCormick was doing better in votes cast on Election Day.