> - Change their constitution That isn't possible > - Change their interpretation of their constitution The BVerfG tries really hard to interpret the constit

> - Change their constitution That isn't possible > - Change their interpretation of their constitution The BVerfG tries really hard to interpret the constitution in a way in line with EU regulations, but it reserves the right not to (if they're "ultra vires" - beyond their power). > - Leave the EU Not going to happen. > It's a basic principle of participation in a Union. Note that the supremacy of the German constitution over EU law was well known at the time of signing the relevant treaties and all parties agreed to proceed anyway. > Germany's or Poland's case is the same as if a State of the US decided that some federal law or the US constitution doesn't apply [...] The EU is not a nation state.