The US has now proven to be unreliable and any further deal with the US will not be considered in the long term which clearly doesn't exist. So if it's not immediately in our interest we are unlike to make any deal about anything with the US as it now. No more loyalty. No more trust. Just aggressive animals trying every chance they get to steal each others food. Yuck.
Consider NATO. The USA spends 3.6% of the world's largest GDP on military. You agreed to spend only 2% of your smaller GDP, but only 3 countries (UK, Poland, Estonia) bother to do so. Overall the EU is a slacker, with some countries spending less than 1% of their GDP. NATO is really about defending Europe, but the military budget of all of Europe is less than half of the US military budget.
Meanwhile, you are imposing your own huge tariffs on US products and flat out banning us from selling you stuff like Swiss cheese. You're even trying to get us to agree to ban making Swiss cheese in our own country, forcing us to import it from Switzerland. I'm guessing you don't see how absurd that is; you have a financial motivation to believe that your rules make sense. You've even screwed up the web, with your silly cookie warnings, and now again with some GDPR thing.
You've had a great deal, and you don't want it to end. I get that. It's understandable. The deal was made in the ruins of WWII, to our disadvantage, when Europe was in ruins. You're better now. It's time to have a fair deal for this modern world.
We make more milk than anyone needs and then we subsidize it and throw half of it out. You guys make more tanks than anyone ever needs. You subsizide it and it collects either dust or you sell it to a small town police station for crowd control.
The world really didn't need us spending more money on war. Instead we spend our money on education for example. The shortage of highly skilled individuals in the west is filled by Europe.
None of this was ever a deal. We just do our part. Do what America lacks. And investing in murder machinery just isn't something our team needed.
But that's the thing, right? We are not one team anymore. You have to admit: that is what changed. I don't have an opinion about Swiss cheese.
You certainly shouldn't rely on the USA for your protection. We had promised to protect the Ukraine. Even when you do get the promised help, as Poland did from the UK in WWII, it typically comes rather late. By the time help arrives you may be starving, homeless, raped, injured, orphaned, or widowed. Pushing that stuff out of your thoughts does not make the possibility go away.