Supreme Court Ruling Means We Probably Won't Know Who Won Pennsylvania Until Days After Election

Pennsylvania is the state most likely to decide next week's presidential election, but a Supreme Court ruling this week has all but guaranteed that we won't know who won the Keystone State's 20 electoral votes on Election Day.

The Supreme Court on Wednesday rejected a Republican effort to force Pennsylvania to discard mail-in ballots received after Election Day, but the high court left open the possibility of re-hearing the case after the election if those ballots could alter the outcome. Last month, the Pennsylvania Supreme Court ordered counties to accept...