The last time someone took a gamble this big (replacing the nominee) in the run up to a presidential election was when McCain - urged on by party elites to DO SOMETHING! — picked Sarah Palin for his VP pick…
Let's grant the obvious that no one seems to want to emphasize: Replacing the nominee at this point—let alone a successful president (perhaps the most successful first-term president since FDR)—would be the biggest gamble in the history of American politics.
