Madison-area progressive radio takes another hit. John "Sly" Sylvester’s daily call-in program has been booted from 93.7 WEKZ-FM. Sylvester, a longtime liberal commentator, announced on his Facebook page that he learned of the change Friday. WEKZ is part of the southern Wisconsin/northern Illinois Big Radio regional chain of eight stations, based in Monroe. He will remain a DJ for the station. The change comes at a bad time for Madison listeners of liberal radio. On Nov. 9, 92.1 The Mic, WXXM-FM, dropped its progressive talk format and replaced it with Christmas music. “The last two years I've been pulling double...