Charming or cold. Flexible or rigid. Paranoid or impulsive or calculating.
How important is the personality of a president? That is, how much of a difference does it actually make to what happens once a person is in office? Are certain personalities more likely to succeed where others are more likely to fail?
"Personality doesn't predict everything, but it does predict some things," says Dean Simonton, a psychology professor at the University of California, Davis, who studies presidential personality. Like most researchers of presidential personality, he believes that personality has consequences you can plot on a graph.
For instance, "how flexible a president is influences how much they use the veto power," Simonton says. "And high need for affiliation wanting to get along with people you're more like to have a scandal when you have a president who's more oriented towards getting along with cronies than in making tough choices that might alienate their best friends."
These, according to Simonton, are just two concrete examples of the real life consequences of personality characteristics.
This brings us to the subject of charisma. Though today we focus a lot on charisma who has it and who doesn't according to Simonton, charisma wasn't always important.
"Charisma was really not very useful in the early presidencies," he says. "There [weren't] that many opportunities to deliver big speeches, and most of the major decisions were done behind closed doors."
As a consequence, Simonton says, most of the presidents from America's early history were not particularly charismatic.
Consider the case of George Washington. Though most people assume Washington must have been intensely charismatic, Simonton says when personality researchers analyze his character, he's evaluated as just average in terms of charisma. Simonton says Washington wasn't particularly outgoing or charming or interested in being with people or energetic. In fact, Simonton says, during his first inaugural address, Washington was horribly awkward.
"He was very timid, visibly nervous, wasn't very dynamic. People were disappointed," Simonton says.
And Simonton says Washington isn't the exception he's the rule among early presidents. Simonton ticks off a list: "Washington, John Adams, Jefferson they're just all average," he says. "Madison is noticeably below average. Monroe is below average, and so is John Quincy Adams. And then you have Jackson he's well above average in charisma. And then we go back to mediocrity again. Van Buren: average. William Harrison: a little bit below average. Tyler: average. Polk: average. Taylor: average. Buchanan: exactly average. Lincoln: a little bit above average."
And then you get to Franklin Delano Roosevelt.
FDR is rated as one of the most charismatic presidents in American history, but more importantly, at least to this story, Simonton says his presidency marks a clear shift in the kind of personality that's useful to have if you're trying to run for president.
You see, suddenly there was the widespread use of radio, and because there was suddenly the widespread use of radio, and later television, "you actually had to be interesting," Simonton says. "You really couldn't be boring."
According to Simonton, before FDR there are two presidents characterized by modern researchers as genuinely charismatic people: Andrew Jackson and Teddy Roosevelt. But afterward, there's a relative explosion: Kennedy, Johnson, Reagan and Clinton in a much shorter period of time.
So what are the policy consequences of this shift toward charismatic personalities?
"Charisma is associated with more legislation, more legislative victories, essentially being more successful in general as a legislator," Simonton says, "It's also associated with making more special messages to Congress and more executive orders."
But on the other hand, Simonton says, it doesn't actually make you better at making good decisions that will steer the country in the right direction.
"There's nothing about being a charismatic president that makes you more effective as a problem solver," he says. "All that charisma does is enable you to influence people. As far as actually being effective, there's no guarantee."
So from Simonton's perspective, it's not clear whether the shift toward charismatic personalities is good or bad for America. What is clear to him is that many of the founding father types we claim to revere probably wouldn't cut it in modern politics.
"I don't think there's a prayer that [George Washington] would be elected today," Simonton says.
Their gifts, he says, have essentially been selected out.