Three US federal judges have dismissed the US government's attempt to restrict postal voting in the US election.
In Wisconsin, a federal judge extended the deadline for correctly postmarked records to be counted to November 9, six days after the actual election date.
After the verdict, the outcome of the Wisconsin presidential election will likely not be known for days.
Conley's injunction is expected to be appealed, including to the Supreme Court.
US President Donald Trump won in Wisconsin in 2016 by less than 23,000 votes.
A second federal judge in Nevada on Monday rejected a lawsuit by his campaign team against the plan to send postal ballot papers to all state citizens.
In New York, a third federal judge instructed the US Postal Service to give priority to all election documents and to allow overtime to do so.
Previously, the Democrats had also won in Michigan and Pennsylvania.
The dispute between Democrats and Republicans over the postal vote has been going on for months.
In the face of the coronavirus pandemic, many polling officers have asked citizens to vote this year by mail. According to a Reuters / Ipsos poll in August, nearly half of Democrats want to vote this way, but only a quarter of Republicans.
Trump has repeatedly claimed that post-election fraud is increasing.
He has not presented evidence of this, experts reject the presentation.
In the 2016 presidential election, almost a quarter of all votes were cast by post.
Some states only vote by mail.