[RWebb]

First, it isn't clear that the US _is_ an empire. IF it is, then we have a very elastic definition going on.

Then you'd have to decide what aspects of the term "Empire" would have to reach what level to answer your question.

e.g. suppose we wind up sharing the planet with China and India - which may well happen - give or take a chunk for Europe and maybe Japan. What would your answer be then?

But for a quick response, I'll say right wing nutballs. They have been proliferating lately and are clearly over-grazing their habitat. If they can't regulate themselves, we will have to call in Terminex (or Roto-Rooter).