Last week's primary election saw several firsts, including same-day voter registration and record-breaking early voting. Cook County Clerk David Orr discusses what it means for the future.

Incumbent Dorothy Brown declared victory on Tuesday night, winning 47 percent of the vote with 95 percent of precincts reporting.

Democratic U.S. Rep. Tammy Duckworth and Republican Sen. Mark Kirk have each won their primaries, setting up possibly one of the most expensive and potentially contentious races for U.S. Senate in November.

Gov. Bruce Rauner is coming up empty in his bid to influence several General Assembly primary races, despite he and allies spending millions of dollars. If tonight’s races are indicative of a wider proxy war with House Speaker Mike Madigan, Madigan appears to be the runaway winner.