Rep. Robin Kelly (D-IL) announced Tuesday she is launching a campaign to replace Senate Minority Whip Dick Durbin (D-IL) after he revealed last month he would not seek reelection to his Illinois Senate seat.

South suburban US Rep. Robin Kelly becomes the second candidate to enter what’s expected to be a crowded field to replace retiring US Sen. Dick Durbin.

Kelly joins Illinois Lt. Gov. Juliana Stratton, who jumped into the contest last month and has been endorsed by Sen. Tammy Duckworth and Gov. JB Pritzker. Rep. Raja Krishnamoorthi is also expected to announce his bid, and Rep. Lauren Underwood continues to eye the seat.