Without comment, the court refused to hear Trump's claims that 221,000 Wisconsin ballots in Dane and Milwaukee counties were illegally cast because of the use of drop boxes during the coronavirus pandemic and that local officials there were allowed to circumvent the voter ID law.
Biden won Wisconsin by roughly 20,000 votes in November. Trump supporters immediately attacked the results in Wisconsin and a handful of other states, including Arizona, Georgia, Michigan and Pennsylvania, claiming massive voter fraud in all the cases.
In December, a three-judge panel with the U.S. Court of Appeals in Chicago ruled against Trump's challenge, saying it lacked merit.
"We agree that Wisconsin lawfully appointed its electors in the manner directed by its legislature and add that the president's claim also fails because of the unreasonable delay that accompanied the challenges the president now wishes to advance against Wisconsin's election procedures," the appeals court decision said then.
The appeals court backed up a U.S. District Court decision in favor of the Wisconsin Elections Commission. The Wisconsin Supreme Court rejected Trump's first lawsuit against the commission on a 4-3 vote.