Representatives Raja Krishnamoorthi and Robin Kelly are competing with Lt. Gov. Juliana Stratton in an open-seat race to replace Senator Richard J. Durbin.

Progressives and moderates vied for influence in Democratic primary

“We showed what’s possible when you listen to the people and give the people what they want,” Stratton said after winning more than 40% of the vote, defeating U.S. Reps. Raja Krishnamoorthi (33.2%) an...