And yes we didn't spend so much on defense as Trump says, but(!) America never really wanted us to be too powerful. They were really happy to play top dog, obviously the more powerful we are as EU, the more viable a geopolitical opponent we are. The US have never really been too happy with nuclear capabilities in Europe and this is the main thing that deters agressors like Russia. Even the UK's is largely built by the US like the Polaris missiles.