What would happen if, at some point in American history, there was a constitutional amendment which changed elections from the "first-past the post" voting system into one of alternative votes. You can just Google/Bing this if you want information about it, but what I want to know is whether there was a point in American history where it could have happened. Could it be part of the expansion of democracy in the progressive era, the tumultuous change of the 60's, or in the 21st century? Any points before 1900 are also ok, including the constitutional convention. If so for any of these, what is the likely result?
Note: "First past the post" means the one with the most votes wins, i.e., the standard system.
Note: "First past the post" means the one with the most votes wins, i.e., the standard system.