To contain communism, thinking was Vietnam went comunist it would spread more globally.
Because it was clear that not all votes were counted for the revote?!.
Depends on the time period, but a theme was that money changers stimulated trade and help in the development of growing economies as the trade between different regions occur or happen during that time period.
This is what the branches do -
Executive- Enforces Laws (consists of the President)
Leg. - Makes Laws
Judicial - Determines the Structure of federal jurisdiction
So the answer to your question is, Executive.