Only when they get sucked up into the US for having gotten too close to the US’ cornhole too many times
Hijack here, but why did the Europeans purposely make a U.S style Federal Government for all of Europe? Also, if the European Union decided, “No more marijuana!” would that prevent the Netherlands, which is an EU member, from still selling it? Do you guys have a concept of “State’s Rights” (Sorry, not sure what to call it in the European context) v. the EU? And how are the rights of individual countries balanced with the desires of the EU as a whole?
Hope that made sense.
There is no US style federal government for all of Europe. European nations have ceded some sovereignty over certain aspects of their governments. None of them has lost sovereignty and they are free to withdraw any time they please - unlike the case with sub-national entities in a federal system.
To further elaborate: most of the “stuff” that the EU does is focused on 2 areas: 1) external economic relations (the EU’s genesis is from a customs union between The Netherlands, Belgium, and Luxembourg) and 2) human rights
in terms of economic relations, most of the smaller states (i.e. not the UK, France, Germany, Spain, Italy) realize that a) most of their economy depends on trades with those large states b) it’s in their best interests to harmonize everything with the larger economies. So alot of the economic policy is “duh” kind of agreement. Not always, but you get the point - Europe realized 20 years ago that they have no future on the world stage if they maintained 20+ separate, small, economies.
The human rights stuff is the area where you can have contention. My understanding is that, again, there is broad social cohesion in Europe so there are alot of “no duh” things that national governments don’t have a problem ceding control of to the ECJ (European Court of Justice) / EU legal framework. The “uh, I object” stuff, I believe, is tiptoed around as much as possible in the name of cooperation
This is largely applicable to the founding nations of the EU. The new admitees are basically told to “shape up or ship out” - they don’t have a whole ton of negotiating power.
Oh man, you don’t ask the easy questions do you? I’ll tell you straight up that there are entire university courses on European studies and any answer you get here is going to be criminally brief. Especially considering the mass amounts of confusion and disinformation that gets spread about the EU.
On the other hand I can’t resist a challenge 
Q1: “Why did the Europeans purposely make a U.S style Federal Government for all of Europe?”
The easy answer is that we didn’t Most people agree that the EU started with the European Coal and Steel Community set up straight after WWII. Coal and Steel were important because they fed the machinery of war, they were what allowed the countries to devastate each other so much. (You have to remember how much Europe had destroyed itself in the previous 40 years, it was the bloodiest most war torn continent on the planet)
WWII also taught us that peace could not be assumed- WWI was supposed to be the “War to end all wars.” That didn’t work out so well, so Germany, France, Italy, Belgium, the Netherlands and Luxembourg decided to be more active this time as Monet (I think) said the idea was to ‘make war not only unthinkable but materially impossible.’ This is why they set up a Supranational (important word in EU politics) to regulate coal and steel production between them all. And it worked so well that things snowballed from there.
At its philosophical heart I believe unity was driven by fear of their own past, this includes the Eastern Expansion and the current push into FRY, the generation that grew up in the aftermath of WWII and during the Cold War are shit scared of war. And that’s not a bad thing. Nobody jump on me because I missed stuff out. You want the whole story read the Wiki
Q2: "If the European Union decided, “No more marijuana!” would that prevent the Netherlands, which is an EU member, from still selling it?
Well that requires understanding the structure of the EU powers. All the powers the EU institutions have were granted to it by multi-lateral treaties between the member states. These tend to be in areas where cooperation gets better results, such as cross border crime, the environment or things affecting the single market.
In Social policy their powers are extremely limited and we haven’t really had the stretching-to-breaking-point internal commerce clause that you guys have. So the EU has no power to tell the Netherlands to stop selling weed. Anyway cocaine and heroin are decriminalised in Portugal so you’d think they’d go for them first
Q3: “Do you guys have a concept of “State’s Rights” (Sorry, not sure what to call it in the European context) v. the EU?”
Yes and no, the Nations of the EU are far, far more powerful than the US states. The question of whether countries are pooling or surrendering sovereignty is eternal and will probably depend upon your political views. The term we like to use is “Subsidiarity” which means decision making at the most appropriate level. The EU 27 are not subordinate to an EU Govt. They are the EU govt. which is why its not a federal system.
Also important is that the EU doesn’t make that many laws directly, most of them only become legal once a country has transcribed it into law through its own parliaments. I don’t believe it works that way in the US.
Q4: “And how are the rights of individual countries balanced with the desires of the EU as a whole?”
Well the most powerful institution in the EU is the council of ministers which is made up of the heads of government from each member state, they can pretty much obstruct everything so states are firmly in charge here.
BTW there are incredible amounts missing from my answers and some of it may be misleading so please check out the links
You are aware that marijuana is illegal in Holland, right? Just to make sure…
That’s only for very technical reasons. Namely Holland’s UN (and other) treaty obligations dealing with narcotics.