What it means is that in the future Europe will have to consider a Trumpist USA to be like a 21st Century version of a totalitarian Eastern Bloc or Soviet country: Orbanism, absurd projectionism, dangerous allies, the state demanding a share of businesses and directing sales and mergers, openly describing the EU (and now the UK) as not friends or even as enemies, trumped up prosecutions of political enemies, assuming that foreign surveillance is built into its products, etc.

Some of these things are already here.