Answer:
The Soviet Union was a Communist country while the USA was a Capitalist country, in efforts to stop the communism from spreading, the United States President Truman offered help to any country that was under military threat, with hopes that this would prevent Communism from spreading.
Honestly I think it's because the polls said clinton was gonna win by a landslide so I think people got comfortable. pollsters call people and ask who they're voting for and I don't think many people want to admit they're voting for someone like trump so the numbers were wrong.
Answer:
It influenced the U.S. into giving official support to the Allies even when it was not directly involved in the war.
The reason for this is that the atlantic charter was an agreement between the United States and the United Kingdom (hence the name) in which both countries laid out ther vision for the future of the world: a world where liberal democracy dominated and economic freedom dominated, a view that was obviously contrary to the views of both Nazi Germany, Fascist Italy, and the Soviet Union.