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The us federal government via Congress can certainly pass laws that supersede state laws. That's the purpose of the 9th amendment and the commerce Clause in the

• rayiner 8y ago
  Under the Supremacy Clause, the federal government can pass laws that preempt state laws. What it cannot do is coerce states into enforcing federal laws. (That's the whole premise behind sanctuary cities--states cannot be compelled to enforce federal immigration laws.) The EU can do both--it can pass laws that override national laws, and it can enforce member states to enforce EU laws, or to pass national laws to comply with EU directives.
• jeff_tyrrill 8y ago
  > The us federal government via Congress can certainly pass laws that supersede state laws But it cannot force the states, specifically, to enforce them. https://en.wikipedia.org/wiki/Tenth_Amendment_to_the_United_States_Constitution#Commandeering https://en.wikipedia.org/wiki/Tenth_Amendment_to_the_United_...