the strongest military and Industrial power in Europe by 1888 was Germany :)
Did the US need to drop the atomic bomb on Japan in order to win the war?
Do you think it was necessary to kill so many Japanese civilians with the atomic bomb in order for Japan to surrender?
In general, people who take a "layer cake" view of federalism believe that state and national government should be as separate as possible, since they don't want state's rights to be trampled upon.
To abolish the national origins quota system that was American immigration policies since the 1920's. It replaced it with a preference system that focused on immigrants skills and family relationships with citizens of the US residents.