A friend and I were conversing about various topics and issues recently and about politics he said something that I never thought about before but

I'm pretty sure he's right. :/ Americans, or anyone paying attention to the American political scene: name 1 election from the last 50 years that America would be radically different today if the other side, or some minor party won. I AM NOT looking for, for example "It would have been a tragedy if Carter was reelected in 1980") I'm looking for details about how it would have been a tragedy if, for example, Carter was reelected in 1980.