Two candidates to replace Jesse Jackson Jr. in Congress say voters should send a message that money cannot buy the election.
New York Mayor Michael Bloomberg's super PAC has spent more than $2 million on ads attacking former Congresswoman Debbie Halvorson over her positions on guns.
Halvorson says if the ads are successful Bloomberg will try to "buy seats" across the country. She says "we can't let that happen."
Alderman Anthony Beale says voters are "extremely upset" that someone from New York is trying to tell people in Illinois how to vote. He predicts there will be a "backlash."
Halvorson, Beale and former state Rep. Robin Kelly are considered front runners in Tuesday's Democratic primary.
Jackson resigned in November. He pleaded guilty this month to misusing campaign funds.