Not 100% sure and I'm sorry about that but I would say religion. I hope I helped.:)
The correct answer is <span>Eisenhower
He believed that if a single country fell to a communist regime, they it would create an effect like dominoes that fall and that all others would fall down. That's the reason why the United States intervened in both Korea and Vietnam. Unlike Korea, the US weren't capable of preventing the victory of Communism in Vietnam.</span>
