LAS VEGAS (AP) — Attorneys for the Trump campaign and Nevada Republicans were asking a state judge on Wednesday to issue a court order to stop the count of mail-in ballots and the use of a computer to check signatures on ballots in Las Vegas, the state’s most populous and Democratic-leaning county.

Democrats, in response, are telling Judge James Wilson Jr. in Carson City that the campaign and GOP are using unfounded complaints to try to disrupt ballot counting in a presidential battleground state.

“Even as mere observers during this election, (the campaign and Republican party) have already been obstructive of the election process,” Democrats said in documents filed ahead of the fast-track hearing.

Wilson told attorneys for the state, Clark County, the Trump campaign and political parties at the start of the virtual hearing that he expects testimony to take all day.

All sides expect Wilson’s decision will be appealed to the Nevada Supreme Court.

The battle is one of several across the U.S. that have emerged after President Donald Trump cast doubt on issues including voter registration, voter rolls and mail-in ballots ahead of the Nov. 3 presidential election.

In Nevada, Republicans and Donald J. Trump for President Inc. complain that party observers aren’t allowed close enough to see whether ballots not accepted by a computer reader should be rejected during second- and third-step validation by election workers.

Clark County Registrar of Voters Joe Gloria said privacy issues prevent over-the-shoulder review of signature validation, and accommodations are made for observers from both parties under coronavirus pandemic distancing requirements.

More than 1.27 million ballots were sent to active voters in the Las Vegas area, which has more than 70% of active voters in the state. Democrats make up almost 41% of registered voters in Clark County; Republicans, 28.3%.

More than 294,000 ballots have been received at the Clark County counting center as of Tuesday, and more than 98% have been accepted as valid, according to state election data. In-person early voting began Oct. 17 in Nevada and runs through Friday.

The state Republican party and Trump campaign filed a new, separate court action Tuesday in Las Vegas — a broad public records request for Gloria, as registrar, to turn over names of Democrats, Republicans and non-partisan ballot workers, election monitors and poll watchers along with details about their work instructions and shifts.