This is just posturing. Pompeo is a notorious war hawk who wants to incite wars with so-called enemies of the United States. Luckily our President is peace minded, and such tricks don’t work very well on him. At least for now.
Additionally, I don’t understand why the US is trying to antagonize China. It’s important to be tough on trade, but we should keep our geopolitical rivals very close. All this move does is punish HK and (possibly) anger China. Truthfully they probably don’t care, it’s a blip on the radar.