A judge in the US state of Wisconsin has been charged for allegedly helping a Mexican man evade immigration officials through a back door during an arrest attempt.

Milwaukee County Circuit Judge Hannah Dugan was arrested in April. Now a federal grand jury has approved the two charges against her, which could see the judge face a prison term.

It marks a further escalation of Donald Trump’s sweeping crackdown on immigration, and has provoked an outcry from Democrats, who accuse the Trump administration of attacking the judicial system.