The European parliament and US congress are both just as united and fragmented.

We disagree internally until we find a common posture that we adopt.

I'm not sure why you talk California public sector instead of something involving multiple states that have differing views, that makes your comparison useless, that's why I say US congress.

Note that your misunderstanding of the situation and lack of knowledge about it is not rare per se, to give an exemple that's why a fair amount of brexiter politician were surprised the EU didn't break itself in internal fight over the UK deal (while they were used to the inside squabble when they were a member, and they failed to notice the similarity with their own parliament compared to their country).

The EU-related structures in Brussels are about as united/fragmented as the US Congress, indeed.

But the national governments are nothing like US state governments. A lot more political fragmentation, plus they still consider themselves executives of sovereign nations with various vital interests and also historic resentments. Few Californian politicians will base their programs on suspicions towards New Mexico. In Poland, "don't kowtow to the Germans" is still a living idea and current PM Tusk is regularly accused of doing precisely that.