The US believed in isolation, if another country attacked the US that is the only way that we would get involved, therefore we tried to stay out of the mass killings and havoc that the Germans and Japanese were creating until we felt that it involved the US. The US did not want to pick a side and have to stay loyal to that side and go to war when that country did because of the alliance. The US finally joined in to help the allied powers to supply them with weapons/military troops. They did not enter the war until December 1941.
According to the United States House of Representatives, the process when a bill is passed and becomes a law in print is called Legislation. A resolution is passed after a bill is proposed to the President for his approval. A bill and a joint resolution are also considered the same. Except that a joint resolution needs a vote from the senate and the House of Representatives and if voted for by the majority is sent straight for implementation and the President's signature is not needed.
A bill may be vetoed by the members or amended. It can result in a lot of debate before it is done either too.
