The correct answer is the United States
He used to live in France for a good part of his life, but when his wife died and world war 2 was beginning, he went to the United States where he held classes and remained there. He lived in the United States until his life ended at 88 years old from heart failure while he lived in New York. Although he did visit USSR during his life in the US, he never remained in USSR.
One of the biggest problems was that the national government had no power to impose taxes. To avoid any perception of “taxation without representation,” the Articles of Confederation allowed only state governments to levy taxes. To pay for its expenses, the national government had to request money from the states.