Former Milwaukee County Circuit Judge Hannah Dugan urged a federal judge this week to toss out her conviction on obstruction charges for helping an illegal immigrant evade arrest last year, as part of a last-ditch effort before she is sentenced.U.S. District Judge Lynn Adelman, an appointee of former President Bill Clinton, heard arguments in a federal courtroom in Milwaukee on Wednesday over Dugan’s motion to reconsider either tossing the conviction or ordering a new trial, with Dugan’s lawyers arguing that one of those options is necessary after a federal appeals court reversed a ruling both the judge and the Justice Department had relied on in Dugan’s case.Dugan’s lawyers pointed to a ruling by the U.S. Court of Appeals for the Fourth Circuit in a case about an illegal immigrant being detained by federal immigration officers, who later escaped and was rearrested by federal officers. The illegal immigrant had been indicted for obstructing an immigration proceeding, but the appeals court reversed a lower court’s ruling upholding the indictment. The Fourth Circuit panel ruled that the immigration arrest was not “pending proceeding” as defined in the federal law under which the illegal immigrant was charged.