The highest authority in the united states is the constitution, because of the supremacy clause constitution, because of the enumerated powers tenth amendment, because of the supremacy clause tenth amendment, because of the enumerated powers

The highest authority in the United States is the Constitution, because of the Supremacy clause.
The Supremacy clause states which power is the highest authority, and the Constitution is the Americans' most important document. 

On april 20, 1814, the dethroned emperor left france for the isle of  elba, where he was exiled under the terms of the treaty of fontainebleau.napoleon  would be allowed to ruleelba, which had 12,000 inhabitants. perhaps cruelly, the treaty allowed him to retain the title "emperor."