Even if they did it would just be a strongly worded letter. The only way I can see to stop an eventual Chinese takeover of Hong Kong would be a military interv

Even if they did it would just be a strongly worded letter. The only way I can see to stop an eventual Chinese takeover of Hong Kong would be a military intervention, which would amount to an invasion of the Chinese Mainland. Which means not only taking and holding Hong Kong before Chinese forces can secure it but suppressing their Naval, Air and Rocket forces. Oh and they're a nuclear power. For better or worse no one's wading into that clusterfuck in the name of civil rights, and no one outside the US has the force projection capacity to even consider it. Maybe we'll see some economic sanctions, but from an ideological perspective the CCP cannot and will not allow Hong Kong to leave China, it would invalidate a cornerstone of their existence (their ability to keep China united, a very rare historical anomaly).