But the Compact Clause takes that possibility from the unthinkable to the unconstitutional because the MSA is precisely the kind of joint state interference with federal laws that the Clause was designed to preclude.

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Roe v Wade's guarantee of first-trimester abortions remains in effect, and the constitution's supremacy clause ensures that when state and federal laws are in conflict, federal law wins.

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First, under the Supremacy Clause of the U.S. Constitution, federal law trumped state law.

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