After the jump: Last night's Political Roundtable. Pima County Democratic Party chairman Jeff Rogers, Republican consultant Amilyn Gordon and Tucson City Councilman Steve Kozachik dig into whether Democrat Richard Carmona has a chance against Republican Congressman Jeff Flake in the U.S. Senate race; preview the race between Republican Jonathan Paton and Democrat Ann Kirkpatrick in Congressional District 1; give Republican Gabby Mercer low odds of unseating Congressman Raul Grijalva; unpack Pima County Supervisor Ray Carroll's win over GOP challenger Sean Collins; look ahead at the upcoming supes race between Republican Ally Miller and Democrat Nancy Young Wright; explain why two of Ally's GOP opponents are complaining about campaign-finance mysteries related to her campaign; wonder about "dark money" in county races; check in on downtown revitalization; and touch on the Koz's proposal for humane greyhound treatment in the city limits.