Chicago voters will choose Brandon Johnson, a progressive Cook County commissioner backed by the powerful teachers union, as the city's next mayor, CNN projects. 

Johnson will win Tuesday's runoff election over Paul Vallas, a moderate former city schools superintendent who had campaigned on a pro-police message in a race where concerns about violent crime were central.

Johnson told supporters his victory had "ushered in a new chapter in the history of our city" and demonstrated a "bold, progressive movement" that he said should be a blueprint for the country.

all the people. Because tonight is a gateway to a new future for our city; a city where you can thrive no matter who you love or how much money you have in your bank account," he said.

Vallas said at his election night event that he had called Johnson to concede the race.

"This campaign I ran to bring the city together would not be a campaign that fulfilled my ambitions if this election is going to divide us more. So it's critically important that we use this opportunity to come together, and I've offered him my full support on his transition," Vallas said.