Republican candidates for Senate, from left: Mark Curran, Tom Tarter, Casey Chlebek, Peggy Hubbard and Robert Marshall appear on a “Chicago Tonight” candidate forum. (WTTW News)

Five Republican candidates are vying to take on Illinois’ long-serving and well-funded incumbent senior senator, Dick Durbin, who is running for a fifth term this fall. All five join “Chicago Tonight” for a candidate forum.

Gov. Bruce Rauner and J.B. Pritzker appear on “Chicago Tonight” on Aug. 14, 2017 and March 14, 2018, respectively.

Brace yourselves, Illinois residents. The matchup between Gov. Bruce Rauner and venture capitalist J.B. Pritkzer virtually guarantees incessant campaigning and political ads leading up to the Nov. 6 general election.

Burr Ridge physician Dr. Robert Marshall tells us why he’s running for governor and discusses his plans for Illinois.