“Jonathan brought a unique energy to his work at City Hall,” Milwaukee Mayor Cavalier Johnson said in a statement. “His passion and commitment were evident every day. No elected official brought more enthusiasm to his work than Jonathan. He was a husband, a father, a son and to me a close friend. My thoughts and condolences go out to him.” Family and friends at this difficult time.

State Sen. Chris Larson described Brostoff as his best friend and said they had known each other since they studied together at the University of Wisconsin-Milwaukee. Larson said he brought Brostoff into the Democratic Party.

“Jonathan was the best friend you could hope for,” Larson said, adding, “He cared about other people with all his heart.”