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In this Jan. 17, 2020, photo Rabbi Fred Reeves, left, speaks during the Friday Shabbat Service at KAM Isaiah Israel in Chicago. (AP Photo / Nam Y. Huh)

As the nation marks the holiday honoring King, the mood surrounding it is overshadowed by deteriorating race relations in an election season that has seen one candidate of color after another quit the 2020 presidential race. 

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This Jan. 17, 2017, file photo shows a Facebook logo at Station F in Paris. Facebook has decided not to limit how political ads can be targeted to specific groups of people, as its main digital-ad rival Google did in November 2019 to fight misinformation. (AP Photo / Thibault Camus, File)

Despite escalating pressure ahead of the 2020 presidential election, Facebook reaffirmed its freewheeling policy on political ads Thursday, saying it won’t ban them, won’t fact-check them and won’t limit how they can be targeted to specific groups of people.

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Democratic presidential candidate former Vice President Joe Biden, one of seven scheduled Democratic candidates participating in a public education forum, makes opening remarks, Saturday, Dec. 14, 2019, in Pittsburgh (AP Photo / Keith Srakocic)

Just seven Democrats will take the stage for the sixth and final round of presidential debates in 2019. That’s down from 20 candidates six months ago. The field may be winnowing, but the primary contest remains deeply unsettled. 

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Former U.S. Rep. Joe Walsh appears on “Chicago Tonight” on Aug. 19, 2019.

Former Illinois congressman Joe Walsh has filed for the New Hampshire presidential primary, officially giving President Donald Trump two major Republican primary challengers in the early voting state.

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In this May 7, 2017 file photo, former Massachusetts Gov. Deval Patrick arrives at the John F. Kennedy Presidential Library and Museum in Boston for the 2017 Profile in Courage award ceremony.  (AP Photo / Steven Senne, File)

In an announcement video, former Massachusetts Gov. Deval Patrick highlighted his poverty-stricken childhood on Chicago’s South Side, saying he’s running for the “people who feel left out and left back.”

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President Donald Trump arrives to speak at the launch of “Black Voices for Trump” at the Georgia World Congress Center, Friday, Nov. 8, 2019, in Atlanta. (AP Photo / Evan Vucci)

During the 2016 campaign, candidate Donald Trump stood in front of largely white crowds and asked black voters to consider, “What the hell do you have to lose?” Trump offered that same message Friday as he launched a black voters coalition in Atlanta, Georgia. 

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Richard Stengel appears on “Chicago Tonight” on Oct. 22, 2019. (WTTW News)

A former Time editor and State Department official on fighting for truth in the age of disinformation. Richard Stengel tells us about his new book “Information Wars.”

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Farmer Randy Miller is shown with his soybeans, Thursday, Aug. 22, 2019, at his farm in Lacona, Iowa.  (AP Photo / Julie Pace)

The Trump administration granted waivers to 31 oil refineries so they don’t have to blend ethanol into their gasoline. Since roughly 40% of the U.S. corn crop is turned into ethanol, it was a fresh blow to corn producers already struggling.

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A long shot presidential candidate from Illinois. Our politics team takes on the 2020 presidential election and more in our weekly roundtable.

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In this Nov. 15, 2011, file photo former U.S. Rep. Joe Walsh, R-Ill., gestures during a news conference on Capitol Hill in Washington. (AP Photo / Carolyn Kaster, File)

“Never Trump” Republicans are eager to see the president confront a credible primary adversary. But the party will likely erect structural barriers that make that kind of challenge exceedingly difficult.

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In this Nov. 15, 2011, file photo former U.S. Rep. Joe Walsh, R-Ill., gestures during a news conference on Capitol Hill in Washington. (AP Photo / Carolyn Kaster, File)

Joe Walsh, a former Illinois congressman and tea party favorite turned radio talk show host, announced a challenge Sunday to President Donald Trump for the Republican nomination in 2020.

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Former U.S. Rep. Joe Walsh appears on “Chicago Tonight” on Aug. 19, 2019.

The former tea party Republican congressman wrote an op-ed in the New York Times calling for a primary challenger to take on President Donald Trump in 2020. Joe Walsh on his change of heart.

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Democrats take the stage for Governor’s Day at the state fair in Springfield. Our politics team tackles the 2020 election and more in our weekly roundtable.

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Sen. Cory Booker, D-New Jersey, former Vice President Joe Biden and Sen. Kamala Harris, D-California, talk after the second of two Democratic presidential primary debates hosted by CNN Wednesday, July 31, 2019, in the Fox Theatre in Detroit. (AP Photo / Paul Sancya)

The evening marked some of the toughest attacks California Sen. Kamala Harris has faced as a candidate. The exchanges were part of a broader ideological fight for the future of the Democratic Party.

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From left, Marianne Williamson, Rep. Tim Ryan, D-Ohio, Sen. Amy Klobuchar, D-Minn., South Bend Mayor Pete Buttigieg, Sen. Bernie Sanders, I-Vt., Sen. Elizabeth Warren, D-Mass., former Texas Rep. Beto O'Rourke, former Colorado Gov. John Hickenlooper, former Maryland Rep. John Delaney and Montana Gov. Steve Bullock participate in the first of two Democratic presidential primary debates hosted by CNN Tuesday, July 30, 2019, in the Fox Theatre in Detroit. (AP Photo / Paul Sancya)

Should Democrats be going big or getting real? That’s the question that dominated the Democratic presidential primary debate as progressive favorites Elizabeth Warren and Bernie Sanders fended off attacks from lesser-known moderates. 

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Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., center, answers a question, during the Democratic primary debate hosted by NBC News at the Adrienne Arsht Center for the Performing Art, Wednesday, June 26, 2019, in Miami. Listening from left are, former Housing and Urban Development Secretary Julian Castro, Sen. Cory Booker, D-N.J., former Texas Rep. Beto O’Rourke, and Sen. Amy Klobuchar, D-Minn. (AP Photo / Wilfredo Lee)

This week, 20 Democratic hopefuls again take the stage to debate the issues currently at the forefront of the 2020 presidential election. Jason DeSanto of Northwestern University previews the event.