The US is already under an authoritarian regime, the only thing keeping the wheels on the bus is a very tired and barely-effective judiciary.

This is a temporary situation because either this regime is going to be knocked out of power, or it's going to follow through on its core Seven Mountains Mandate[1] theology and go full totalitarian.

Normally totalitarianism fears are overblown, but I think that these zealots would absolutely use the latest frontier models and pervasive surveillance to make The Handmaid's Tale look like a liberal fantasy by comparison.

[1] https://en.wikipedia.org/wiki/Seven_Mountain_Mandate