The Republican National Committee and Republican Party of Pennsylvania are appealing a Commonwealth Court ruling that mail-in ballots with incorrect or missing dates on their outer envelopes should be counted.
The appeal to the state Supreme Court was expected. It is being fast-tracked, like all elections cases this year.
Whatever is ultimately decided could have ramifications for the November election.
The appeal, filed Tuesday, challenges the findings of a 91-page opinion issued Friday by a Commonwealth Court panel that found it unconstitutional under state law to refuse to count those ballots.