Why did the american public shift their feelings on isolationism?

The correct answer is that the bombing of Pearl Harbor in 1941 by Japan made American isolationists quickly change their tune as America was under attack. Once Germany declared war on the US, the US was fully into the war.

president franklin roosevelt supported the tva as part of his first new deal measures approved by congress in 1933. this new agency was designed to control floods, produce electric power, and improve the lives of people living in the tennessee valley. the tva accomplished many of these goals despite problems.

answer: in october 1962, an american u-2 spy plane secretly photographed nuclear missile sites being built by the soviet union on the island of cuba. president kennedy did not want the soviet union and cuba to know that he had discovered the missiles. he met in secret with his advisors for several days to discuss the problem.

explanation: