To become a legal us citizen united states has

To become a  legal U.S. citizen the United States has ways you can apply for U.S. citizenship. There are many rules to this, some being, you have to have had a Green Card for at least 5 years, must be 18 or older, must be able to speak English, along with write and read it, etc.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.