Fulton County District Attorney Fani Willis (left) and Donald Trump, right. (Photos: John Disney and Diego M. Radzinschi/ALM) Fulton County District Attorney Fani Willis (left) and former President Donald Trump. (Photos: John Disney and Diego M. Radzinschi/ALM)

Former President Donald Trump and other defendants in Georgia's election interference case filed court papers Monday seeking to appeal a judge's ruling not to disqualify Fulton County District Attorney Fani Willis from their prosecution or dismiss the charges.

The resignation of the special prosecutor with whom Willis had a romantic relationship is not enough to correct the appearance of impropriety the judge found, according to a court filing by attorneys for Trump, former New York Mayor Rudy Giuliani, former White House chief of staff Mark Meadows and five other defendants.

"Whether District Attorney Willis and her Office are permitted to continue representing the State of Georgia in prosecuting the Defendants in this action is of the utmost importance to this case, and ensuring the appellate courts have the opportunity to weigh in on these matters pre-trial is paramount," they wrote.