The US Supreme Court on Friday left in place a Pennsylvania court ruling that is expected to expand options for voters whose mail-in ballots are rejected for technical reasons to have their votes counted,

Now, two new cases may address the rules in the biggest battleground state on the eve of the election, with implications for thousands of ballots that have already been mailed in or dropped off.The latest fights — and there may be more to come — present two issues.

The US Supreme Court rejected a Republican Party bid to stop potentially tens of thousands of votes from being counted in next week’s presidential election in the pivotal state of Pennsylvania.