The EU is neither willing nor capable of challenging US supremacy economically or politically any time soon (not even mentioning the military). And as it stands with the current war in Ukraine the EU was further shot in the foot. Today the EU is a good ally to further bolster US' claim for supremacy.
China on the other hand has all but openly challenged the US for that title. On the surface at least they are skyrocketing in every area (won't go into how or why). They had the same "incompatible" political system for decades but they stood as manufacturing partner for many of those decades until Western leaders noticed a trend with a dangerous slope. And as it sank in that inaction means ceding the top spot, here is some action. CIA trying to overturn a regime is a tall order with China so the more handy ways were economic: tariffs and bans.
China on the other hand has all but openly challenged the US for that title. On the surface at least they are skyrocketing in every area (won't go into how or why). They had the same "incompatible" political system for decades but they stood as manufacturing partner for many of those decades until Western leaders noticed a trend with a dangerous slope. And as it sank in that inaction means ceding the top spot, here is some action. CIA trying to overturn a regime is a tall order with China so the more handy ways were economic: tariffs and bans.