State governments have the power to regulate interstate trade. establish local governments. declare war. negotiate treaties.

The second alternative is correct.

The USA is a Federation. The Feredação consist of a set of independent states that unite to form a central government that represents them in questions common to all the states, as for example, the negotiations of treaties and declarations of war.

However, the Constitution itself establishes the independence of states to form their own local governments, creating their own state constitutions.

answer; (a) he was a u.s senator for 38 years;