The correct answer is Herbert Hoover
He believed that the Great Depression would not become as severe as it did and implemented many dubious laws that actually made things even worse like introducing a new tariff system which was supposed to help but actually destroyed foreign trade for example. He was easily beaten by Roosevelt who promised the new deal.
Xia dynasty is the correct answer!
States and the federal government have both exclusive powers and concurrent powers. There is an ongoing negotiation over the balance of power between the two levels.
I believe the correct answer to your question is parallel. I apologize for the late answer and if the answer I provided is incorrect.