LANSING, Mich. — Supporters of President-elect Donald J. Trump have filed legal challenges in Pennsylvania, Wisconsin and Michigan in a suddenly robust effort to stop the presidential election recount efforts there.
Bill Schuette, the attorney general of Michigan, said that the recount, initiated by Jill Stein, the Green Party candidate, 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,” Mr. Schuette, a Republican, said in a court filing.
A lawsuit against the Wisconsin Elections Commission filed in Federal District Court by the Great America PAC, the Stop Hillary PAC and Ronald R. Johnson, a Wisconsin resident, argued that the recount could “unjustifiably cast doubt” on Mr. Trump’s victory in that state.
The plaintiffs argued that the recount, which began across the state’s 72 counties on Thursday morning, should be halted immediately, in part because there is a substantial chance that it cannot be accurately completed by the deadline of Dec. 12. In 2011, a statewide recount took close to a month.
In Michigan on Friday, where the recount is still pending, the Board of State Canvassers met to consider an objection to the recount by Mr. Trump.
Lawyers for Mr. Trump told the canvassing board, which is made up of two Democrats and two Republicans, that it should not allow a recount to proceed, describing it as needless, too expensive and not required by Michigan law. Besides, Ms. Stein came nowhere near winning the state.
“This recount petition is absolutely unprecedented in the history of Michigan election law,” said Gary Gordon, a lawyer for Mr. Trump and his campaign.
A lawyer for Ms. Stein, Mark Brewer, said Mr. Trump’s campaign was making a “desperate attempt” to avoid a recount. “I would remind everybody that the original source of the allegation that this election was rigged was Mr. Trump,” Mr. Brewer told the board.
The Michigan board split, 2-2, along party lines, meaning the recount objection failed.
Lawyers for Mr. Trump and his allies are also seeking to halt legal proceedings by Ms. Stein to contest the statewide election results in Pennsylvania.
Lawrence J. Tabas, general counsel of the Republican Party of Pennsylvania, said in an interview on Friday that Ms. Stein’s lawyers had fallen short of demonstrating that there was fraud or illegal action in the Nov. 8 election. “They know they have no claim,” he said.
“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,” said Mr. Tabas, who along with other lawyers, submitted a lengthy brief filed in Pennsylvania court on Thursday.
The recounts bids are widely viewed as having little chance of making a difference. But Ms Stein, in a statement, said the challenges to them were an effort to put “party politics above country.”
“In an election already tainted by suspicion, previously expressed by Donald Trump himself,” she said, “verifying the vote is a common-sense procedure that would put all concerns around voter disenfranchisement to rest. Trump’s desperate attempts to silence voter demands for recounts raise a simple question: why is Donald Trump afraid of these recounts?”
Ms. Stein has raised millions of dollars for an effort to force recounts in Wisconsin, Michigan and Pennsylvania, states that have recently voted Democratic and where Mr. Trump won by relatively thin margins.