I disagree. The real threat to this country are the wingnut patriot groups that spawn the likes of Timothy McVeigh, a domestic terrorist - and may he rot in hell for what he did.
Liberalism has never been a threat to America, and in fact has made our country stronger and better.
Conservatism has never been a threat to America, and in fact has made our country stronger and better.
And I don't find these statements to be contradictory. We need both to balance our country, and that is the way it always will be. Push and pull, push and pull.
Extremism on either end is what we should alert us. I don't see anything that is going on today to say that the far-left has "taken over."
All I hear is a bunch of whiners who lost an election, and are screaming fire in a theater.