SPRINGFIELD — Former state Sen. Tom Cullerton pleaded guilty Tuesday to one count of embezzlement and could face more than a year in federal prison.During a plea hearing in federal court in Chicago, Cullerton admitted that he received pay and benefits from the Teamsters Joint Council 25 during 2015 while doing little or no work for the union. In addition to his salary, prosecutors alleged, Cullerton also received bonuses and health care benefits.Cullerton, a Villa Park Democrat, was indicted in 2019 on 40 counts of …