Ihave a prompt for political science and i need with explaining this !

Congress would most likely rely on the following:

The Supremacy Clause of the United States Constitution declares the laws of the Constitution as supreme over state laws. In the case of conflict, federal law takes precedence over state laws and state constitutions. This cqn be found in Article 6, Clause 2 of the United States Constitution.

States would most likely rely on:

The nullification theory allowing states to nullify federal laws they find as unconstitutional, or interposition the right of a state to interpose between the states citizens and the federal government.

the density would be a smaller number.

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.