Alexi Giannoulias leads trader consensus in the 2027 Chicago mayoral race due to his substantial fundraising edge—nearly $22 million on hand compared to far smaller totals for rivals—and high voter excitement in summer polling, where over half of residents expressed interest in his candidacy. The incumbent, Brandon Johnson, faces headwinds from approval ratings in the low-to-mid 20s and a University of Chicago poll showing just 13.6% support for his reelection bid, though he formally launched his campaign on September 13 with backing from progressive unions. Susana Mendoza and a crowded field of declared candidates, including Mike Quigley, Maria Pappas, and others, trail in early indicators. The February 23 first-round vote, with a possible April 6 runoff, favors contenders with broad coalitions and resources in this nonpartisan contest.