There has been election fraud in Chicago for a long time. Here are some quotes from Lapham's Quarterly, Vol. XIII, Number 4, Fall 2020, the Democracy issue, page 158.
The quote below is from a special grand jury report. The actions of the grand jury resulted in the conviction of 58 individuals, including precinct captains, election judges, and party workers, for acts of voter fraud that were committed during Illinois' November 1982 general election. "In some Chicago precincts, vote fraud has been routine," the report concludes, "and has occurred over an extended period of time. The finer points of committing such offenses have actually been passed between successive generations of precinct captains."
Here is some testimony from the grand jury.
One precinct captain stated that he decided to run a learn election during the primary prior to the 1982 general election. He didn't pay the alcoholics two dollars to vote or forge voters' names that election. A few days after that election, he was called in before the ward committeeman and asked what his problem was and whether he was trying to go against the ward. He told the ward committeeman that he had tried to run a clean election. This precinct captain had been working a city job on the night shift and running a profitable part-time business during the day. A few days after his talk with the ward committeeman, the precinct captain's shift, and the location of his job, were abruptly changed. His shift was changed to a day shift so that he was forced to give up his part-time business. His new job location was not accessible using freeways and was very difficult for him to reach. After that experience, the precinct captain decided that he would commit voter fraud in subsequent elections as had had been trained to do.
You can examine current cases of election fraud at this website: Election Fraud Cases, listed on the Heritage Foundation website. https://www.heritage.org/voterfraud/search