The former lawman who made his fight against illegal immigration a fixture of his speeches and media interviews during his last three campaigns asked a judge on Friday to prohibit prosecutors from mentioning those statements at his April 25 trial on a criminal contempt-of-court charge. Arpaio, who was defeated last November after 24 years as sheriff for sprawling Maricopa County that encompasses Phoenix, faces the misdemeanor charge for disobeying a court order to halt his immigration patrols, which continued for 17 months after a judge issued the order. Goldman said letting statements made by Arpaio during his campaigns to be used at trial will have a chilling effect on protected political speech about issues of public importance.