What can citizens in some states do if they do not like a state law?

If they can gain enough people they can have a popular referandum to nullify the law or if the law is unconstitutional the state can vote to nullify it

Explanation:

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.