Oil is definitely a big factor in the US's involvement in the Middle East. It is arguable that the first large-scale US Military operation on the Middle East was Operation Desert Storm. We see a lot of fighting over oil in this period of war. In addition to oil, Iran has nuclear weapons, and thus makes the US on automatic alert. I hope this helped !
because republican were more in favor of the african american votes than the democratics?
It gave the same rights that the englishmen had to the colonists.