The main obstacle is that the EU became deeply neoliberal in its thinking, judging state subsidies as worse than slave labour.
For example, when the US rolled out the cornucopia of state protectionism that is the IRA the EU has mainly responded by saying "actually, that's not very free marked of you USA".
For example, when the US rolled out the cornucopia of state protectionism that is the IRA the EU has mainly responded by saying "actually, that's not very free marked of you USA".