The DNC is trying to decide among Chicago, New York, Houston and Atlanta.
Each city hosted competing receptions Friday.
According to the Sun Times, Chicago's event featured foods unique to the city, like Vienna beef, Connie’s pizza, Buona, Garrett popcorn and Eli’s cheesecake.
Lightfoot and U.S. Sen. Tammy Duckworth will also pitch the United Center as the main convention venue.
Chicago last hosted the Democratic National Convention in 1996.