How did american imperialism differ from european imperialism?

1: how did the rise of rulers with total power in europe and asia lead to world war 2?

The "nationalists" and fascists battled against the "republicans" and communists in a civil war in the 1930s in

The 20th amendment, also called the lame duck amendment, decreased the amount of time between the presidential election and the inaugration of the new president. what are the advancements that allowed for this amendment?