Karen Lewis has brain tumor, not running for mayor of Chicago

Chicago Teachers Union President Karen Lewis, who just pulled out of mayoral contention, is suffering from a cancerous brain tumor that was diagnosed shortly after she experienced a severe headache on Oct. 5.

As a result, Lewis underwent a five-hour surgery at Northwestern Hospital, where she is scheduled to undergo a regimen of chemotherapy and radiation, according to a source close to Lewis. The tumor had nothing to do with her weight loss surgery in Mexico.

Lewis has wanted Mayor Rahm Emanuel gone practically since he took office, but she will not be the one to unseat him in February, Jay Travis, the head of her mayoral exploratory committee, said Monday.

More details as the story develops on Early & Often