The main grievance of the colonists leading up to the Revolution was
that Britain was taxing them too heavily. Less taxation would have led
to less protest, which could have inevitably led to the colonies staying
under British possession.  
        
             
        
        
        
You can claim to be winning a war if your casualties are much less than the casualties of the other side
        
             
        
        
        
Answer:
Explanation:
Roosevelt was not an isolationist at heart. But WWI was still fresh in the minds of the general public. Many families had lost relatives which up until WWII was the most devastating war the world had seen. Many Americans didn't want to get involved in Europe's politics and problems. A marvelous movie has been made about this called <em>The Americanization of Emily</em> staring a very young Julie Andrews (who does not sing a note) and a very handsome earthy James Garner. It captures beautifully how Americans felt about getting involved in other people's wars.
Roosevelt himself wanted to help Great Britain, but the problems with domestic worries in the United States forced him to hesitate. He needed something to motivate the public into getting into a war they did not want. 
Japan provided him with Pearl Harbor. The American Public was moved into action. Some of the Japanese knew it, including the architect of the attack on Pearl Harbor (Admiral Yamamoto who famously said "All we have accomplished was to awaken a sleeping giant.")
So began the bloodiest war the planet has ever seen.
I'm sorry this is so long, but you cannot talk about the transition period of WWII without knowing how people felt.