IIRC

Also, if we look back at the winners, there's a tendency for the winner to have one defining characteristic: charisma

— Madeleine McKendrick (@MGMcKendrick) February 20, 2020

Bill Clinton had bucket loads of charisma; just not in 1992. The most charismatic candidate that year was Ross Perot, and he was batshit crazy. Most analysts agree Clinton won partly because Perot siphoned votes from Poppy.

Obama had charisma: eventually. First, though, he was “No Drama Obama.” That was not a compliment on his charisma. Indeed, the last truly charismatic President was also the first candidate to have that label applied to him, and he was followed by LBJ, Nixon, Carter, Reagan, Bush, Clinton, Shrub, and Obama. How many of those Presidents were ever considered “charismatic “? Not as many as weren’t, and fewer of them were considered so as candidates than as incumbents. It’s still true: nothing succeeds like success; and nobody is as charismatic as someone you already know to be charismatic.

(Although Lordy, these debates are tedious.)