In the presidential swing state of New Hampshire, a judge has ruled that polls in the Democratic stronghold of Dover will remain open for an additional hour — mintues before they were initially scheduled to close.

The issue stemmed from a Tuesday morning email from Dover city officials to roughly 250 residents with incorrect information — that the polls will close at 8 p.m. Polls were scheduled to close at 7 p.m.

City officials corrected the time in a later email on Tuesday, but New Hampshire Democratic Party lawyers have said there was no way to know if a voter saw the first email but not the second with the accurate time.