One of the hallmarks of the Soviet regime (continued under Putin, of course) was their political use of psychiatry to detain their critics as "mentally ill". Sadly, its already taking off in Trump's America:
A college professor who criticised online Donald Trump and his plans for America, said he was arrested and detained after campus police claimed he was a threat.
Kevin Allred, who teaches Women’s and Gender Studies at Rutgers University, New Jersey, said officers detained him after deciding his comments on the campus, and on Twitter, were dangerous. He said he was forced to undergo a psychiatric evaluation before before being released.
In one of his tweets he referred to a comment he made about the 2nd Amendment, the addition to the US constitution which gun rights activists says gives them the right to bear arms.
His actual "crime"? He talked about burning the American flag - constitutionally protected free speech - and asked if conservatives would care about the 2nd Amendment so much of guns killed more white people. This isn't "threatening" by any stretch of the imagination. But its clearly now politically unacceptable, and US police can see which way the wind is blowing.
If you're a liberal American, you should get out while you still can.