Former CPS CEO Paul Vallas and Cook County Comm. Brandon Johnson are running for Chicago mayor. [Provided photo for Vallas, Colin Boyle/Block Club for Johnson]

A new Chicago Index survey shows public safety, schools and transit matter most to likely voters and an increase in name recognition for Cook County Comm. Brandon Johnson (D-1) and former Chicago Public Schools CEO Paul Vallas in the upcoming mayoral election. 

The survey, administered by The Chicago Index, in conjunction with the Colorado-based firm Polco, collected answers between Feb. 9 and 20 from 1,332 people who said they lived in Chicago. The survey was weighted to better reflect disparities in the actual demographics of those who responded to the survey. The survey’s weighting was applied to demographic metrics such as race, gender, area of residence and housing tenure. Its margin of error is 3 percent.