Trail Mix: Illinois congressional primary races to watch

• The state's Democratic-controlled Legislature redrew Illinois' congressional districts last year, which pit some incumbents against each other in the primary.

Here are some of the congressional district races to watch:

1st: 17 Democrats are vying to replace retiring Rep. Bobby Rush.

• Jonathan Jackson, son of Rev. Jesse Jackson, leads the pack. But he's run into a bit of a scandal as he didn't file his financial disclosures.
• Powerful names, including State Sen. Jacqueline Collins, Ald. Pat Dowell (3rd) and community activist Jahmal Cole, have also thrown in their hats.

3rd: Four Democrats, including Ald. Gilbert Villegas (36th) and state Rep. Delia Ramirez, are facing off.

• Villegas, who heads the Latino Caucus in Chicago City Council, snagged the endorsement of former U.S. Rep. Luis Gutierrez, and Ramirez got a nod from current U.S. Rep. Chuy Garcia.

6th: This heavyweight fight pits two Democratic incumbents — Reps. Sean Casten and Marie Newman — against each other. And it's getting chippy.

• Newman recently used her dog's toilet habits to characterize Casten's attacks on her.

15th: Two Republican incumbents want to lead this newly drawn downstate district.

• Rep. Rodney Davis, who currently represents the 13th District, boasts a strong record in Congress and a potential committee chairmanship.
• But Rep. Mary Miller, who currently represents the 15th, boasts a thumbs up from former President Trump.