(Reuters) – The Supreme Court of Nevada rejected an appeal late Tuesday from President Donald Trump’s campaign to overturn the election results in the state.

Last week, a district court in Nevada ruled that the Trump campaign had not proven a claim that there had been a malfunction in voting devices and the contest between Trump and Biden had been manipulated.

“We also are not convinced that the district court erred in applying a burden of proof by clear and convincing evidence, as supported by the cases cited in the district court’s order,” Nevada’s Supreme Court said in its judgement.

Nevada’s Republican Party said it was “extremely disappointed” by the decision.

“We were not afforded an opportunity to write our brief or argue the case in front of the Court,” Nevada’s GOP said in a statement. “Full denial of legitimate due process and appellate rights is truly unprecedented, shocking and extraordinary.”

Tuesday was marked as the so-called safe harbor deadline for states to resolve disputes arising from the election. Under U.S. law, Congress will consider a state’s election result to be “conclusive” if it is finalized by the safe harbor date.

(Reporting by Aakriti Bhalla in Bengaluru; Editing by Peter Graff)