COLUMBUS, Ohio – With three weeks to go until Election Day, Democrats and Republicans are wrangling over early voting in the presidential battleground state of Ohio, with President Obama’s campaign urging the U.S. Supreme Court not to hear the Ohio secretary of state’s appeal of a lower court ruling on the issue.

The campaign said in a court filing Friday that the high court should deny Ohio Secretary of State John Husted’s appeal of a lower court ruling that reinstated early voting on the three days before Election Day and returned discretion to local elections boards.

Husted, a Republican, has said the ruling would affect how elections are run in all 50 states and is “an unprecedented intrusion” into how states run elections. Fifteen states and several military organizations support Husted.

The campaign’s filing says Husted’s application meets neither the Supreme Court’s standards for hearing appeals nor for granting a stay. It also says the 6th U.S. Circuit Court of Appeals’ reinstatement of the early voting on the final three days “will have no impact beyond Ohio’s borders.” The campaign’s filing also says the law likely would violate the Constitution’s equal protection clause.

Husted has said all counties should have the same early-voting hours and days.

Before the law was changed, local boards of elections set early voting hours on the three final days and weekday hours, and therefore, weekend voting varied among counties.