It looks like a ransom note, but it is not being sent by kidnappers. It is being promoted by the Patrick Administration, the Boston Police Department, and the State Police, and delivered to drivers on the Massachusetts Turnpike courtesy of John Rosenthal, a provocative gun control activist from Newton. Article Tools "We have your President and Congress," declares the message in letters that look as if they had been snipped from a newspaper. It is signed simply, NRA, referring to the National Rifle Association, and will be unveiled today on a 252-foot billboard on the Mass. Turnpike near Fenway Park....