CHICAGO — Two of Illinois’ most watched state primary contests are happening in Chicago’s 5th House District and the Senate’s 50th District in Springfield and Jacksonville. Here’s a look at each of the candidates.

5th House District, Democratic primary

Incumbent: Ken Dunkin

Age: 50.

Political background: Has served in the state House since 2002.

Challenger: Juliana Stratton

Age: 50.

Political background: Most recently served as director of the Center for Public Safety and Justice at the University of Illinois at Chicago.

50th Senate District, Republican primary

Incumbent: Sam McCann

Age: 46.

Political background: Has served in the state Senate since 2011.

Challenger: Bryce Benton

Age: 33.

Political background: Illinois State Police trooper with no prior experience in elected office.