The US constitution does not apply to citizens - it applies to the government.
Citizens in the US are implicitly allowed to do whatever they like, subject to laws that the government enacts. The constitution describes those areas where the government is allowed to pass laws. All other areas are off limits to the government, and left for the people to do as they like. To emphasize the point, the amendments specify certain areas that the government is extra-especially-not-allowed to create any laws about, like speech.
The extent to which this is observed today is quite dubious. There are lots of laws that the US government passes which have little to do with anything the constitution allows them to do - but they kinda hand-wave around that and gesture toward something, like the "commerce clause" or whatnot as justification.
But in theory - for any law passed - it is unconstitutional unless you can say exactly where in the constitution it is explicitly allowed.
* Having written all that, I will add that "government" above means the US Federal government, not all the other ones. State, local, have a lot of latitude to make whatever laws they want, unless a federal law specifically prohibits it.
> * Having written all that, I will add that "government" above means the US Federal government, not all the other ones. State, local, have a lot of latitude to make whatever laws they want, unless a federal law specifically prohibits it.
This is not entirely correct. In general many elements of the Constitution are incorporated and apply at all levels of government. It even outranks state constitutions where the two conflict.
No, in other words, states and local governments are also bound by the Constitution in many of the the same ways that the federal government is.
The major difference is the Tenth Amendment, which sets the states apart by specifying that any powers not "delegated to" the federal government are reserved exclusively for the states. (In practice courts have found many "implied powers" that are not explicitly enumerated).
Citizens in the US are implicitly allowed to do whatever they like, subject to laws that the government enacts. The constitution describes those areas where the government is allowed to pass laws. All other areas are off limits to the government, and left for the people to do as they like. To emphasize the point, the amendments specify certain areas that the government is extra-especially-not-allowed to create any laws about, like speech.
The extent to which this is observed today is quite dubious. There are lots of laws that the US government passes which have little to do with anything the constitution allows them to do - but they kinda hand-wave around that and gesture toward something, like the "commerce clause" or whatnot as justification.
But in theory - for any law passed - it is unconstitutional unless you can say exactly where in the constitution it is explicitly allowed.
* Having written all that, I will add that "government" above means the US Federal government, not all the other ones. State, local, have a lot of latitude to make whatever laws they want, unless a federal law specifically prohibits it.