Alexi Giannoulias holds the strongest position in the 2027 Chicago mayoral race, driven by his substantial campaign resources exceeding $19 million, broad union endorsements including SEIU locals, and consistent leads in recent University of Chicago polling that place him well ahead of incumbent Brandon Johnson. Petition filings closed in late October with a field of 16 candidates, though challenges could narrow the ballot before certification in December. Johnson's low approval ratings around 22 percent and fractured labor support have contributed to his weaker standing, while other contenders such as Susana Mendoza and Maria Pappas trail significantly in both fundraising and voter surveys. The February 23 first-round vote, with a possible April runoff, favors candidates who can consolidate support across Chicago's voting blocs amid ongoing concerns over public safety and city finances.