The Preamble to the Bill of Rights:
"THE Conventions of a number of the States, having at the time of their adopting the Constitution, expressed a desire, in order to prevent misconstruction or abuse of its powers, that further declaratory and restrictive clauses should be added: And as extending the ground of public confidence in the Government will best insure the beneficent ends of its institution."
The legislatures have their own constitutions to violate. 