Can States not enforce American laws, or can States enforce them? Why did I read an article saying that Arizona should enforce federal laws?

The Federation is the center, and the States are similar to our powerful vassals before. The state legislature thinks it is unreasonable and can not implement it. Therefore, there are not only federal laws in the United States, but also many state laws, and the laws of each state are different, different, different, which is also the reason for the high salary of American lawyers. Different living communities have different rules. The United States is a big immigrant country, and the folk customs brought by immigrants vary from community to community. Some communities don't celebrate Christmas.