MILWAUKEE (AP) – Missouri Governor Jay Nixon knows where the political land mines are in Wisconsin.  The most dangerous one he has to dodge will participating in a National Governors Association meeting in Milwaukee? Having his picture taken with a Miller beer.        Nixon joked Saturday about how poorly that would go over with voters back home in Missouri, home of Miller’s competitor Anheuser-Busch. Miller is based on Milwaukee.   Walker joked to Nixon that if he’s caught with a Miller beer he could face a recall election. Walker became the first governor in U.S. history to defeat a recall last year.  His recall was spurred not by beer choice but anger over his law effectively ending collective bargaining rights for public workers.