A divided Pennsylvania Supreme Court agreed, saying that provisional ballots serve the "dual purpose" of preventing double voting while protecting voter's right to have one vote counted. The state constitution's voting protections do not allow for the ...

In 2022, about 78% of mail ballots supported the Democratic candidate for Senate; so far, the early vote this year appears to be more balanced by party. If the margin of victory in Pennsylvania in 2024 is similar to the margin of victory in 2020, mail ballots will not be the difference. But in a particularly close contest, every vote will matter.

It is hard to estimate how many ballots will be affected by the decision or whether it will ultimately impact the outcome of the presidential election.