Conventional wisdom and polls forecast Republican Gov. Bruce Rauner will outmaneuver scrappy challenger Rep. Jeanne Ives, and in the Democratic camp billionaire businessman J.B. Pritzker is touted as the front-runner over Sen. Daniel Biss and developer Chris Kennedy. But after President Donald Trump upset expectations in 2016, all bets should be off in Tuesday's election, especially with potential low turnout and undecided voters creating flux, suburban experts said.