Keyword is stable. Biden Harris represent the quiet stable imperialism of old, while Trump's brash policies expose American imperialism for the world to seeI don't really follow this so I don't know what you mean.
Trump is trying viciously hard fighting for American imperialism. Says he wants to punish all countries that use other currencies than the USD for international trade. Harris is not nearly as aggressive-sounding to someone who loves American imperialism so I don't see this angle either.
For example under Biden, arms sales just seem like perfectly normal things. Under Trump, they were exposed to be what they actually are: tribute payments.