Do u think J.D. Vance will become president before the end of trump’s term?

I think it's likely. Bondi's avoidance of this question is rather telling.

Senator Whitehouse grills Pam Bondi on Epstein and Trump: “There has been public reporting that Epstein showed people photos of Trump with half naked young women. Do you know if FBI found those photographs in their search of Epstein safe. Have you seen any such thing.”

[media=https://youtu.be/Gd_ySEoMhUE]

it's a yes/no question, but Bondi only responds with whataboutism & accusations. At least she knows not to lie under oath!!

I can't see that happening, but how or why might it, short of Trump standing down for some reason (also unlikely)?

Do the USA's Constitution and governmental processes allow for an early change of President - other of course than in the case of incapacity or death of the incumbent?

I sure as hell hope so.

I think jd will be Rubio’s VP

By vote? No. But maybe.

Impossible to say. He might or might not be the Republican candidate, and no-one has the slightest idea who the Democrat candidate might be.