!!! Overview
[{$pagename}] and treaties, so long as they are in accordance with the [Constitution], preempt conflicting state and territorial laws in the 50 U.S. states and in the territories.

However, the scope of [{$pagename}] preemption is limited because the scope of federal power is not universal. In the dual-sovereign system of American federalism (actually tripartite because of the presence of Indian reservations), states are the plenary sovereigns, each with their own [Constitution], while the federal sovereign possesses only the limited supreme authority enumerated in the [Constitution].

!! More Information
There might be more information for this subject on one of the following:
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