Andrew Johnson was the 17th POTUS
William McKinley set up his campaign headquarters in Chicago Illinois when he ran against William Jennings Bryan
An ideological war existed? Sorry, its just your format is kind of awkward is all.
We went back to "Undisturbed Isolationism". We cut ourselves off diplomatically for the most part from many European powers out of fear of being brought into another World War. America was completely and only about America.
The correct answer is: 3 trillion dollars