It's definitely a two way street, but there's less incentive now for the US to stay involved. We're a net petroleum exporter now, Texas of all places is adopting renewables like crazy (proving their viability), highly autonomous and mechanized manufacturing is almost comparable to outsourced production and we don't need soyuz for space launches (soon).

All of that combined, plus the growing need to address our own impoverished parts of the country is making a lot of people in the US think it's time to let Europe do it's own thing.