Why exactly are people thinking about revolting under Wallace? The usual factors that lead to a revolt are either disasters like a bad economy/losing a war, or people get fed up with the current system and see no other way to change it. Neither of those exist under Wallace. At the time of FDR's death the US was doing really well. Both fronts in WWII were going well, the economy was booming, etc. Also, people weren't fed up with the system. They were generally fans of what the government was doing, and believed that it was looking out for them. Even if everyone decided that Wallace was awful they don't need to revolt. There's a Congressional election literally the next year where voters can severely hamper the Wallace Administration's ability to get things done, and then in 1948 they can simply vote him out of office. This is also totally out of character for both Eisenhower and Wallace. Neither man had dictatorial ambitions, and Eisenhower was fairly moderate (which makes him leading a state which murders leftists, including the President, rather bizarre).