Mayoral hopeful Paul Vallas has picked up another big name endorsement, while grassroots supporters of rival candidate Brandon Johnson were at City Hall making their voices heard. WBBM Political Editor Craig Dellimore reports. 

<p>Mayoral hopeful Paul Vallas has picked up another big name endorsement, while grassroots supporters of rival candidate Brandon Johnson were at City Hall making their voices heard. WBBM Political Editor Craig Dellimore reports. </p>

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