>

Charisma matters to some extent.  Being cute or handsome can help them.
But we've had plenty of celebrity candidates who were former actors or TV personalities and they crashed and burned.  So looks aren't everything.
I'm pretty sure that's already happening on some level...
But for a better answer, there's plenty in both party that are conventionally attractive, but that and charm are different things. It doesn't matter if you have the looks but then you go out there and Jeb it. >

Good looks alone are not enough in politics. However, as in all areas, it helps. Personality and character, a degree of intellectual integrity and honesty still matters to most voters. >

To some extent, I feel that Kari Lake, with her hair and make up and dress style just so, was mad for losing against the more natural and earthy Katie. >

She lost because she ran like a damn crazy person. If she ran with the same persona she had as a newscaster, she’d easily have won. >

I don’t think the American public is mature enough to deal with good looking people in high office.
Look at the way we responded to the Kennedys. We tried to make royalty out of them. Their administration was called “Camelot”! as if they were King Arthur and Guenivere! An objective analysis of the Kennedy administration would be so so at best. Yet JFK was arguably the handsomest President of all time. Could have been a movie star. Without television, Richard Nixon would have beaten JFK in the election. JFK was also given a much friendlier treatment during his press conferences (undeservedly) than any other President since.
We haven’t had a handsome guy of that caliber run for office since JFK, but I bet if Justin Trudeau had been born in the USA, the electorate would go nuts over him. Handsome! Sophisticated! He’s fluent in French! No wonder he’s wildly popular in Canada! >

Trump was pretty open about supporting people because they “look the part” or are “from central casting”
It’s sad that we have come to that, but it’s the world we live in.
Unrelated, but if you’re reading this Alexandra Hunt, hmu ;) >

Of course that's been going on since forever, but you are suggesting actual good looks contests? This world might be crazy enough for that to be an improvement.
From what I can tell, it's all about the hair.
I seem to remember Sam Seaborne on West Wing dismissing a guy as being all hairdo.
Hair and skin and jawlines and teeth and cheekbones. We could use an AI for this, no problem. >

There's likely some halo effect from it but to what extent I don't know. It seems age is still a more prominent factor for this kind of effect given people often associate wisdom or knowledge with it. Being old usually precludes being attractive. >

It helps! But it’s a poor way to choose someone that will need brains, morals, and charisma.