Karen Lewis is one of eight Chicago Teachers Union employees paid more than $100,000 a year by the union. Rich Hein / Sun-Times file photo
The Chicago Teachers Union, having rejected a new teachers contract, is in a high-stakes battle with Mayor Rahm Emanuel’s administration.And with more than $25 million a year in dues coming from 28,000 teachers and other school employees, CTU president Karen Lewis and her 77-member staff are a well-funded adversary for the mayor and his schools chief, Forrest Claypool, a Chicago Sun-Times examination of the union’s financial filings shows.