Answer:
Americans wanted to stay out because Congress passed a series of Neutrality acts in the 1930's, which was aimed to prevent involvement in wars, and it banned the American citizens from trading with nations at war.
Some of the efficient components of Russia is oil and gas
The sinking of the Lustania? I think that was the name of the cruise ship, and was a rallying cry for the US into ww1, as Americans died in the transit.
