I think the better way is a federation but not for everything. Only for diplomacy, defense and little more. At least as a first step. That way there's no possibility of having an uberpressident that can do the same Trump is doing.

I'm not against talking. I just point out that it is a shame that most activities are limited to talking.

The EU is comprised of sovereign entities, but those entities have chosen to give up certain competencies to the Union for various benefits. The EU already handles trade diplomacy and monetary policy through democratic institutions; it isn't that hard to imagine that could also take on competencies related to defense.

The EU also could share the competency of defense with the various nations. After all, there are other countries which have sub national entities that have their own militaries.