What to Watch in Tuesday’s Illinois Primaries — and Where the Money Went

Illinois voters will decide Tuesday's primaries for an open Senate seat and multiple House races, providing a test of whether grassroots campaigns can compete against well-funded super PACs. The contest will reveal whether candidates backed by smaller donors and volunteer networks can overcome the spending advantages of traditional political machines and outside groups. An open Senate seat—where no incumbent is running—typically attracts multiple candidates and high-dollar spending, making the race a particularly notable barometer of campaign finance power. The results could signal broader trends heading into the general election about which fundraising strategies prove most effective in persuading Democratic or Republican primary voters. Money and turnout patterns in these races will likely inform campaign decisions in other competitive districts nationwide.