In truth what would that be? We have plenty of laws to cover political misbehavior but in my lifetime they have not been enforced against politicians or the favored rich.
By reason of the 10th Amendment, the powers not granted to the federal government are reserved to the states and the people thereof. The federal government gets around this by offering money to the states with strings attached covering the things not mentioned in the Constitution. And, where does the federal government get this money? By taxation. So, ignoring differences in the distribution of income by state, the federals cripple the states, through high taxation, and then offers the states crutches in the form of aid to education, Medicaid, etc. Chief Justice John Marshall once said the power to tax is the power to destroy. Somebody has to think this one through so that the federal government can’t destroy the states.