There's an argument that the 22nd Amendment to the #USConstitution would allow #DonaldJTrump a 3rd term if #PresidentVance were elected with Trump as Vice-President and then #JDVance resigned or mysteriously fell out of a first-floor window, or something.
There's a counterargument that the 12th Amendment handles this. Its proponents are not thinking like #SCOTUS judges. The 12th regulates elections. The 25th Amendment succession process is not an election.