FUD surrounding the U.S government resistance towards bitcoin

The democratic party, seems to not really like bitcoin at all. They say they are "protecting the people".

So far China and India banned bitcoin. 1/5 Americans (90 million) own now hold some type of crypto currency.

If the U.S government really wants to crack down on bitcoin, can they? and when doing so can they really cause the price to plummet if they want to? How is this even a democracy if just the very few want to ban bitcoin all together with support from corporate interest/ banks?

Can Bitcoin really be used to evade taxes like they say? That's their main argument.

Right now, that's what is really giving me some uncertainty.