Meanwhile in Arizona:

The Republican groups are challenging the way counties verify signatures on mail-in ballots that are dropped off at the polls on Election Day, according to the complaint obtained by The Arizona Republic.

At stake is an unknown number of ballots that could tip the result of the U.S. Senate race. Just 17,000 votes separated Republican Martha McSally and Democrat Kyrsten Sinema as of Wednesday evening, a cliffhanger that could take days, if not weeks, to call.

The Arizona Republic estimates that there may be more than 600,000 ballots yet to be tallied.