The judicial branch checks that all laws are constitutional
The Mass Transit served the Middle and Upper classes in the 1890's. Hope this helps you!
The Supremacy Clause is a clause within Article VI of the U.S. Constitution which dictates that federal law is the "supreme law of the land." ... Under the doctrine of preemption, which is based on the Supremacy Clause, federal law preempts state law, even when the laws conflict.
The process by which the Constitution was approved by the states is known as ratification.