How you keep a politician or political party afraid in any arbitrary democratic country? You threaten them with possibility of not being re-elected. That is pra

How you keep a politician or political party afraid in any arbitrary democratic country? You threaten them with possibility of not being re-elected. That is practically the only non-violent way. Now the question applied to USA would be - can citizens of USA elect an alternative politician or party? They can't, due to medieval first past the post system. And this is really your answer - until you keep the election system as is, you will get the same politicians or worse. Because they are not afraid anymore.