(The Center Square) – Monday begins the Democratic National Convention in Chicago and leaders from both parties in Illinois are outlining how they see the major event impacting taxpayers. Just as with the Republican National Convention last month in Milwaukee, the DNC in Chicago will cost taxpayers $75 million. Law enforcement agencies from around the area are on the ground with security perimeters around the United Center and McCormick Place. Tens of thousands of protesters are also expected. Rallying Democrats at the Illinois State Fair Wednesday, Gov. J.B. Pritzker previewed his plans to sh…