Answer:
The president is Andrew Johnson
There were several reasons why the Founding Fathers replaced the Articles of Confederation with the Constitution, but the main one is that the Articles gave Congress no power to tax the states, which was very much needed for debt payments.
Well even though they wanted to be an isolated country without other people's cultures mixed in, they did take a couple of things from the Chinese. Like the writing system and the religion (Buddhism). I think they sort of took influences from the Europeans as well, I think. They had samurais, similar to Knights; both held courage and loyalty above all things. I hope a helped a bit!