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Candidate for Cook County state’s attorney Patrick O’Brien appears on “Chicago Tonight” on Monday, Oct. 26, 2020. (WTTW News)

It’s one of the most contentious races on the Cook County ballot. Former Cook County judge and prosecutor Patrick O’Brien talks about his campaign to unseat Democratic incumbent Kim Foxx.

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U.S. Sen. Dick Durbin (WTTW News via CNN)

Sen. Dick Durbin has become one of the most powerful members of the Senate, but challengers say he is the ultimate Washington insider who’s lost sight of what’s best for Illinois. Meet two of those challengers.

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Republican Jeanne Ives talks about her bid to unseat freshman Democratic U.S. Rep. Sean Casten.

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Republican state Sen. Jim Oberweis discusses his effort to unseat incumbent Rep. Lauren Underwood, a Democrat, in Illinois’ 14th Congressional District.

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For the first time in decades, a candidate with a name other than Lipinski will represent Illinois’ 3rd Congressional District in Congress. We hear from Republican Mike Fricilone and Democrat Marie Newman.

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Democratic candidates for Cook County state’s attorney, from left: incumbent Kim Foxx, Bill Conway, Donna More and Bob Fioretti appear on a “Chicago Tonight” candidate forum. (WTTW News)

Political ads have been flooding the airways for months in the race for Cook County state’s attorney. And they have been getting increasingly nasty.

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Republican candidates for Cook County state’s attorney Patrick O’Brien, left, and Christopher Pfannkuche appear on a “Chicago Tonight” candidate forum. (WTTW News)

With violent crime in Chicago of huge concern to voters, we hear from the two GOP candidates aiming to be the next Cook County state’s attorney.

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Democratic candidates for Cook County Circuit Court Clerk, from left: Jacob Meister, Iris Martinez, Richard Boykin and Michael Cabonargi appear on a “Chicago Tonight” candidate forum. (WTTW News)

In August, Dorothy Brown announced she would not seek reelection as clerk of the Circuit Court of Cook County, opening up her seat to four Democratic hopefuls. They join “Chicago Tonight” for a candidate forum.

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 Democratic candidates for Illinois’ 3rd Congressional District, from left: Marie Newman, Rush Darwish, incumbent Dan Lipinski and Charles Hughes appear on a “Chicago Tonight” candidate forum. (WTTW News)

Illinois’ 3rd Congressional District has long been a Democratic stronghold, but in recent years the Democrat representing it has been under fire from his ideological left.

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Republican candidates for Senate, from left: Mark Curran, Tom Tarter, Casey Chlebek, Peggy Hubbard and Robert Marshall appear on a “Chicago Tonight” candidate forum. (WTTW News)

Five Republican candidates are vying to take on Illinois’ long-serving and well-funded incumbent senior senator, Dick Durbin, who is running for a fifth term this fall. All five join “Chicago Tonight” for a candidate forum.

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Aldermanic candidates for the 40th Ward: Incumbent Ald. Patrick O’Connor, left, and Andre Vasquez.

In 2015, 40th Ward Ald. Patrick O’Connor easily won re-election. But the second-longest-serving member of the Chicago City Council is now in one of the most contentious runoff races in the city. He and challenger Andre Vasquez join us.

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 Mayoral candidates Lori Lightfoot, left, and Toni Preckwinkle appear on “Chicago Tonight” on March 21, 2019.

The back-and-forth over political donations during Thursday’s forum was the latest in a series of contentious public appearances between Chicago mayoral candidates Lori Lightfoot and Toni Preckwinkle.

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 Mayoral candidates Lori Lightfoot, left, and Toni Preckwinkle appear on “Chicago Tonight” on May 14, 2018 and Oct. 16, 2017, respectively.

Mayoral candidates Lori Lightfoot and Toni Preckwinkle join us for a special edition of “Chicago Tonight” moderated by Phil Ponce and featuring a live studio audience. Watch the full video online.

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Aldermanic candidates for the 43rd Ward: Incumbent Ald. Michele Smith and Derek Lindblom.

In a North Side ward adjacent to the proposed site of the controversial Lincoln Yards development, two candidates fight for the 43rd Ward aldermanic seat. Incumbent Ald. Michele Smith and Derek Lindblom join us.

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Aldermanic candidates for the 30th Ward: Incumbent Ald. Ariel Reboyras and Jessica Gutierrez.

Ald. Ariel Reboyras has represented the 30th Ward since 2003 and is now facing Jessica Gutierrez, the daughter of former U.S. Rep. Luis Gutierrez, in his first runoff election.

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City treasurer candidates Melissa Conyears-Ervin and Ameya Pawar participate in a “Chicago Tonight” forum on March 18, 2019.

Following a three-way battle to replace outgoing Treasurer Kurt Summers in the Feb. 26 election, Chicago voters will have to choose between two candidates in the April 2 runoff.