I guess its no surprise that Harris was a terrible candidate. I mean she lost against like 10-11 candidates in 2020. Biden was a better candidate.
You think he's going to die because of his mental health? Because Biden is still alive and kicking, and...oh, is the President right now.
It will likely depend on the economic situation. From what I've seen, JD Vance is a relatively weak politician. He doesn't have a particularly charismatic personality like Trump. Luckily for him DeSantis, nor anybody else in the GOP does either. I don't think he ever could have gone from Senator to POTUS and he likely needed this job to take the top one. However, given Trump's age and obesity, he might not need to be elected to take the position. I don't know who the Democrats will run, maybe Shapiro? People are high on his political skills, but I haven't seen enough of them yet.
I think the worst thing Harris did was not be willing to break from Biden. This is the trouble a loyal VP finds themself in when they run under an unpopular POTUS. She tried to ignore and dance around the question whenever asked if she would do anything differently. They really needed to put up a new candidate (as Biden probably would have lost MN/NM/NJ/VA/NH and every swing Senate seat giving the GOP a possible filibuster proof Senate majority), but they were way to hesitant to deny a black woman her rightful undemocratic nomination to fight against the man trying to "end democracy".