The Democrats are going to have a hard time selling anyone unless it's an unknown, and even an unknown is a hard sell. But an unknown may be the best chance they have in 2028.
Barring some kind of utter catastrophe in the next 3 years, I would say Vance is a lock. The senate or the house I'm not sure, but Vance has it. He has all the pros of trump, and none of the cons which is a shitty, egotistical narcissistic personality. He has the MAGA swagger without the shitty attitude and privileged background.
Plus Usha is going to get him a BIG boost with the brown vote, not to mention that any claims of muh huwyte supremacy will be brushed off by normie voters with "He can't be racist he's married to an Indian woman, you dumb fuck."
He's also going to get a huge bump with the uneducated because he's a bogan, his mother was a junkie and he doesn't hide that fact, he wears it as a badge of honor and people respect him for it.
Vance is all pro, no con.