The 2018 Illinois governor’s race is on pace to be the most expensive in US history. This is because the race is propelled by a wealthy Republican incumbent and a billionaire Democrat. JB Pritzker is one of the world’s richest people and is among several Democrats trying to defeat multimillionaire and current Illinois Governor Bruce Rauner. Both Rauner and Pritzker have been airing TV ads more than a year before Election Day. Combined, all of the candidates have raised over $100-million in the past year. Most of that comes from Rauner and Pritzker’s own money. Political Date Director Colin Williams says that the contest could become the most expensive governor’s race. The record was set back in 2010 in California, where candidates spend a combined $280-million.