Walker seems to really have some weird hate for unions. He recently claimed that Ronald Reagan's firing of the air traffic controllers after they walked off the job in 1981 was "one of the most significant foreign policy decisions of our lifetime." He even claimed there were documents showing how the Soviets took Reagan "more seriously" after the firings. but when asked about it couldn't provide any proof. Politifact gave him a 'pants on fire' for the claim of proof, but the opinion itself is simply bizarre.
http://www.politifact.com/wisconsin/statements/2015/jan/28/scott-walker/scott-walker-records-show-soviets-treated-ronald-r/
