The untied states entry into world war 2 had which of these effects on domestic policies

American and domestic foreign policy during World War 2 were linked in that once America entered the war it had a significant impact on its economy.

When we say during World War 2 we must remember that the USA did not enter the war until December 1941 after the attack on Pearl Harbour. Even then there was no guarantee that they would become involved in a war in Europe. It was Hitler who declared war on the USA