There might have been no such intervention. Put yourself in Huang's shoes for a minute, or a board member if you prefer, lick your finger, put it up to see how the winds are blowing and think of what you'd find. No need for pressure, just glance at the news and realize that the pressure will be forthcoming, and it won't/wouldn't just be "the China hawk fraction" (sic) but widespread.

It is also tanking the Nvidia stock price causing many to sell, freeing up a lot of capital ... just before the Anthropic IPO...

Surely an AI market falling from this is not a good environment for Anthropic's IPO?