Comment by ricree

The full text reads:

>The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

What, exactly, this means has been a matter of ongoing debate for much of the amendment's existence. Some of the more fervent states' rights advocates have considered it a hard check on the power of the federal government, while at other times it has been considered little more than a truism.

My own personal read on it is that it defines the nature of state and federal lawmaking power, from the perspective of the constitution. Federal law is strict. The constitution allows it certain specific powers and subjects it is allowed to govern, and it must stay within those. State laws, from a federal perspective, are permissive. The constitution bars certain powers from the states, but anything not banned they are allowed to regulate.

In practice, this means less than it might, because the constitution's powers allow the federal government a lot of room to regulate and govern. At the state level, incorporation doctrine also limits their powers a fair bit.

In terms of judicial history, the 10th is one of the less significant parts of the Bill of Rights, becoming an issue in court far less than, say, the First Amendment (freedom of speech/press/religion) or Fourth (limits to search and seizure/ warrant requirements). On the other hand, it has come up more often than the Third (forced quartering of troops during times of peace).