WASHINGTON -- Supporters of President-elect Donald Trump have filed legal challenges in Pennsylvania, Wisconsin and Michigan to prevent vote recount efforts pushed by Green Party candidate Jill Stein.

In Wisconsin, two pro-Trump groups -- the Great America PAC and Stop Hillary PAC -- joined resident Ronald Johnson in suing the state’s election commission in federal district court, arguing that the recount “unjustifiably cast doubt” on Trump’s victory in the state and may not be completed in time for the Dec. 12 deadline.

Michigan Attorney General Bill Schuette, a Republican, filed suit in state court on Friday, arguing that the recount process would put Michigan voters at risk of “paying millions and potentially losing their voice in the Electoral College in the process.”

“This court cannot allow a dilatory and frivolous request for a recount by an aggrieved party to silence all Michigan votes for president,” Schuette said in the filing.

Green Party presidential candidate Jill Stein has said she is pursuing a presidential recount in Michigan because of the number of blank ballots in Michigan's presidential election results. (Dennis Van Tine/Abaca Press/TNS) (TNS)

The Board of State Canvassers in Michigan, made up of two Republicans and two Democrats, met Friday to consider an objection to the recount from Trump’s lawyers.

“This recount petition is absolutely unprecedented in the history of Michigan election law,” said Gary Gordon, a Trump campaign lawyer.

Other lawyers for Trump and the Republican Party are also seeking to block Stein’s efforts to force a recount in Pennsylvania.

Lawrence Tabas, general counsel of the Pennsylvania Republican Party, told The New York Times on Friday that Stein's lawyers "have no claim" that any fraud or illegal action took place on election day.

“This action by Jill Stein and her supporters -- I couldn’t even call it a Hail Mary pass, because that would be insulting to the Hail Mary pass,” Tabas said.

Stein announced her recount efforts last week after cybersecurity experts noted potential irregularities in the states’ results, but no evidence of a hack has been found. The improbable bid has filled Stein’s coffers with millions of dollars in donations to support the efforts.

Stein has insisted her only goal is to ensure the integrity of the electoral process, not to swing the election results toward Democratic candidate Hillary Clinton. The Green Party candidate has described the legal challenges to her efforts as a “politically motivated attempt” to stop the recounts, and her lawyers have mounted a defense of the recounts in court.

Trump topped Clinton by about 10,700 votes in Michigan out of 4.8 million ballots cast. He won by about 22,100 in Wisconsin and 67,400 in Pennsylvania.

Clinton would need to win all three states to reverse Trump’s overall victory, an occurrence that election analysts have said would be extremely unlikely.