Quickly, a number of candidates jumped into the race to replace him.
Some are familiar names, while others are political newcomers. Over the next few weeks, we'll talk with the candidates ahead of next month's election on February 26, 2019. We begin with Amara Enyia and Paul Vallas.
WATCH: Interview with Chicago mayoral candidate Amara Enyia
WATCH: interview with Chicago mayoral candidate Paul Vallas