"My primary concern is the risk that authoritarian governments—not solely the Chinese Communist Party (CCP), although the CCP is clearly the most capable threat—build AI models that are more powerful than those built by the US, and use them to achieve permanent military superiority or perpetrate incredibly deep repression of their own people."

Hmmmm.

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