We stayed "out" of the war until late December 1941.
There were apologists and those who said it wasn't our fight.
George Orwell was also struck by how it was forbidden to be critical of Stalin's USSR during the war but it was quite acceptable to be openly critical of the US and UK.
As weegee pointed out, there were plenty who pushed to keep the US out of WWII, other than (of course) to help Stalin by extending Lend-Lease to the USSR, as well as philosophically isolationist groups like the one headed by Charles Lindbergh, and of course the pro-Hitler fifth column movement.
http://img158.exs.cx/img158/8695/peace7wz.jpg