Lawyers for Democrats around the country are filing lawsuits claiming Republicans and the campaign of GOP presidential nominee Donald Trump are pushing supporters to intimidate and confront voters on Election Day.
Trump has called on his supporters to act as "election observers" in certain areas of the country to help prevent fraud.
In Ohio, a federal judge on Friday issued a temporary restraining order against Trump's campaign and his friend and informal adviser, Roger Stone, barring them from harassing or intimidating Ohio voters during Tuesday's election.
Attorneys representing the Democratic Party argued Friday in New Jersey court that the GOP was coordinating with Trump to intimidate voters, accusations that the Republican Party says are not true in that state or in five other states where Democrats are waging similar battles.
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Here's a look at the cases being heard around the country:
The case is different than the ones filed in the states as it relates to a consent decree in place since 1982 regulating what the Republican National Committee can do when it comes to issues of ballot security.
The consent decree was created after Democrats alleged that the RNC helped intimidate black voters during New Jersey's 1981 gubernatorial election. The RNC and New Jersey's Republican Party allegedly had off-duty law enforcement officers stand at polling places in urban areas wearing "National Ballot Security Task Force" armbands. Some had guns visible.
The RNC admitted no wrongdoing but agreed to the decree to settle the case. The decree only regulates work done by the RNC and is scheduled to end next year. The Democratic National Committee wants it extended another eight years, but needs to convince a judge that the RNC has violated the 34-year-old rules.
Joshua Kaul, an attorney representing the Democratic National Committee, told the judge in Newark, New Jersey, on Friday that Trump has "repeatedly encouraged his supporters to engage in vigilante efforts" in the guise of ferreting out potential voter fraud. Kaul said the RNC is participating.
Bobby Burchfield, an attorney for Republicans, told the judge that party volunteers are engaging in normal poll-watching and that Democrats haven't found one instance in which someone was intimidated or prevented from voting.
Judge John Michael Vazquez did not immediately rule.
A federal judge said Friday in issuing a temporary restraining order against Trump's campaign and his friend Roger Stone that anyone who engaged in intimidation or harassment inside or near Ohio polling places would face contempt of court charges.
U.S. District Judge James Gwin in Cleveland said charges would be filed regardless of political alliance.
The judge's written order blocks activities from both campaigns that include unauthorized poll watching, the admonishing or questioning of voters, and taking photos or recording voters inside or near polling places.
The Ohio Democratic Party had claimed in its lawsuit that the Ohio GOP, the Trump campaign, Stone and Stone's political action committee Stop the Steal were conspiring to suppress minorities in urban areas from casting ballots on Tuesday. The lawsuit cited comments made by Trump and his surrogates about voter fraud and efforts by Democrats to steal the election.
Gwin dismissed the Ohio Republican Party as a defendant in the case.
David Pepper, chairman of the Ohio Democratic Party, said the judge's decision was "a big win for Ohio voters."
The Michigan Democratic Party on Friday filed a lawsuit Friday asking a judge to order the state Republican Party not to intimidate voters on Election Day.
Democrats sued in Detroit federal court, seeking an injunction against Republicans, Donald Trump's presidential campaign and GOP allies. The court filing listed no specific allegations in Michigan.
Republican spokeswoman Sarah Anderson said the lawsuit is "insulting and shameful." She called it a "desperate act" by supporters of Democratic presidential nominee Hillary Clinton.
A federal judge in Las Vegas said Friday he'll hold a hearing Monday before deciding whether to restrict Election Day exit polling in Nevada by Republican political operative Roger Stone's group, "Stop the Steal."
Attorney Paul Jensen, representing Stone, said he needed time to prepare because he only recently got legal notice about a lawsuit alleging that Stone is encouraging what Nevada Democrats call "vigilante voter intimidation" by exit-pollers.
U.S. District Judge Richard Boulware said he's also keeping time open for a Tuesday hearing, in case allegations of voter intimidation come up during morning voting.
The judge made official his findings following hearings Wednesday and Thursday that the Nevada Republican Party and the Donald Trump campaign aren't working together and the campaign isn't training people to intimidate voters in Nevada.
The decision not to issue a restraining order regarding poll-watchers came after Nevada's top Trump election day official testified Thursday that he went back and notified everyone he's trained as poll observers about state laws they have to follow if they challenge a voter's eligibility.
At a four-hour proceeding in Phoenix on Thursday, Stone's attorney said Democrats have not produced evidence that his client or "Stop the Steal" is intimidating voters.
"My client is engaging in legal First Amendment speech," attorney Paul Jensen told U.S. District Judge John Tuchi.
The chairman of the Arizona Republican Party testified that the party helped train certified poll watchers and told them to avoid confronting voters inside polling locations and not to intimidate voters. Chairman Robert Graham acknowledged that they are encouraged to follow those they suspect of illegally dropping off multiple ballots out of the polling place to photograph them.
The attorney for Arizona Democrats, Mike Gottlieb, urged Tuchi to issue an injunction blocking what he called illegal tactics.
"This is an election unlike any other where the candidate has gone around the country and implored his supporters to engage in aggressive poll watching," Gottlieb said.
A judge has scheduled arguments in Pennsylvania on Monday.