Senator Ron Johnson may now be a 9/11 truther.  The Republican and senior senator representing Wisconsin told right-wing commentator Benny Johnson on the latter’s podcast Monday that he has questions about the official story of the September 11, 2001, attacks.  Specifically, the senator echoed a conspiracy theory about the collapse of Building 7 , suggesting that the building on the World Trade Center complex fell as the result of a controlled demolition and attacking the National Institute of