Various parts of the U.S. are already there. You know where those are if you live in them. Ask yourself: How many times have stopped yourself from asserting 2 + 2 indeed is four[1] in conversations with colleagues, neighbors, teachers, or even family because you may lose your income or worse if you did not at least remain silent in the face of assertions to the contrary?
For those not familiar, here is the beginning of the relevant passage[1]:
> 'It is impossible to see reality except by looking through the eyes of the Party. That is the fact that you have got to relearn, Winston. It needs an act of self-destruction, an effort of the will. You must humble yourself before you can become sane.'
> He paused for a few moments, as though to allow what he had been saying to sink in.
> 'Do you remember,' he went on, 'writing in your diary, "Freedom is the freedom to say that two plus two make four"?'
> 'Yes,' said Winston.
> O'Brien held up his left hand, its back towards Winston, with the thumb hidden and the four fingers extended.
> 'How many fingers am I holding up, Winston?'
> 'Four.'
> 'And if the party says that it is not four but five—then how many?'
> ...
[1]: https://2x2.rocks/