MILWAUKEE — A Wisconsin judge pleaded not guilty Thursday to charges accusing her of helping a man who is in the country illegally evade U.S. immigration authorities seeking to arrest him in her courthouse.

Milwaukee County Circuit Judge Hannah Dugan entered the plea during a brief arraignment in federal court. Magistrate Judge Stephen Dries scheduled a trial to begin July 21. Dugan’s lead attorney, Steven Biskupic, told the judge that he expects the trial to last a week.

Dugan, her lawyers and prosecutors left the hearing without speaking to reporters.

She is charged with concealing an individual to prevent arrest and obstruction. Prosecutors say she escorted Eduardo Flores-Ruiz and his lawyer out of her courtroom through a back door April 18 after learning that U.S. Immigration and Customs Enforcement agents were in the courthouse seeking to arrest him for being in the country illegally. She could face up to six years in prison if convicted on both counts.

Her attorneys say she’s innocent. They filed a motion Wednesday to dismiss the case, saying she was acting in her official capacity as a judge and therefore is immune to prosecution. They also maintain that the federal government violated Wisconsin’s sovereignty by disrupting a state courtroom and prosecuting a state judge.

Dugan’s arrest has inflamed tensions between Trump administration and Democrats over the president’s sweeping immigration crackdown.

Dozens of demonstrators gathered outside the courthouse ahead of Thursday’s hearing, with some holding signs that read, “Only Fascists Arrest Judges — Drop the Charges,” “Department of Justice Over-Reach” and “Keep Your Hands Off Our Judges!!” The crowd chanted “Due process rights,” “Hands off our freedom,” and “Si se puede” — Spanish for “Yes, we can” — which is a rallying cry for immigrant rights advocates.

One man stood alone across the street holding a Trump flag.

John Vaudreuil, a former federal prosecutor in Wisconsin who isn’t involved in Dugan’s or Flores-Ruiz’s cases, said the Trump administration seems to want to make an example out of Dugan.

Her attorneys will likely push for a jury trial, Vaudreuil said, because they know that “people feel very strongly about the way the president and administration is conducting immigration policy.”