Mazeski has lent $195,000 of her own money to her bid. She sits on the Barrington Hills Plan Commission and on the board of the Illinois Environmental Council, which promotes environmental laws and policies. She lost an Illinois Senate race in 2016 to Republican Dan McConchie of Hawthorn Woods. Her campaign is emphasizing that she is a breast cancer survivor who would be a "strong, fearless advocate" on the issue of health care, her webpage says. Roskam consistently has voted to repeal and replace the Affordable Care Act, commonly known as Obamacare.