The second episode of Political Roundtable airs tonight on Arizona Illustrated. Arizona Public Media reporter Christopher Conover, Republican political strategist Jonathan Paton and Democratic political strategist Rodd McLeod talk about trash politics in the Tucson mayor's race, free speech at City Hall and the question of civility in politics. Tune in at 6:30 p.m. on Channel 6 and you'll see Paton lay down a challenge to Pima County Democratic chairman Jeff Rogers.