This is probably not a surprising move, but groups supporting Donald Trump have filed suit this morning to stop the recount in Wisconsin. The suit was filed by numerous plaintiffs including The Great America PAC and Stop Hillary PAC. 

The gist of the complaint is that there is not a consistent method for determining the intent of voters on ballots that may not be decisive. They are depending on the Bush v. Gore precedent as a defense of their position. In general the argument is that there is not a standard to ensure that votes will be treated equally in different jurisdictions. There is also not time to develop and promote a standard fast enough to make the deadline of the federal safe harbor law.  Reports appear to be that the elections commission is asking canvassers to continue the recount until such time that there is a legal decision.  Fasten your seatbelts, this will continue to be a bumpy ride.