1967: The 25th Amendment (VP Succeeds President) Is Adopted

Fredric March as US President Jordan Lyman in 'Seven Days In May.' Source: IMDB

What happens if a U.S. President resigns -- or has to be removed from office? Until the 25th Amendment to the Constitution was adopted in 1967, there wasn't a firm answer. 

Such a weighty document as the Constitution has seen many changes over the years as our days of throwing tea into harbors and wooden teeth are well behind us. One such change that came more recently than many people recall was the 25th Amendment, which stipulates the line of succession and, most importantly, the terms of passing the title of Commander in Chief. Surprisingly, prior to 1967, Presidents of the United States wrote their own terms of who would succeed them in the case of death or incapacitation. Here’s everything you ever wanted to know about the 25th Amendment of our Constitution.