> The U.S. for various bizarre reasons, has most incumbents always safe > in their seats.

In any other country, the "bizarre reasons" would be corruption,
abuse of power and an absurd political system. If, say,
Slobodan Milosovic had suggested a copy of the U.S. political
system should be set up in Yugoslavia, the world would have, rightly,
collectively said "whom are you trying to kid; get rid of this
bullshit".

In a masterstroke of doublespeak, the U.S. uses buzzwords like
"democracy" and has convinced many people that it actually
implements democracy within its borders, when in reality it
is one of the least democratic countries.

But, hey, what do you expect from a country where half the
population believes God created the world 6000 years ago?