That sure would make the warmongers of the west happy. Putin is one of the few world leaders willing to truly stand up to the anglo-zionist empire.
But, I doubt it. Calling it - this is FUD
Also calling this as FUD
That said I wouldn't put it past some US agent to put some uranium or Polonium in his drinks etc.
Or radation of a sort
Taking a lesson from Russian History
http://www.theguardian.com/world/2013/nov/06/polonium-210-poison-alexander-litvinenko