Most likely he won't dump Vance because generally VP's are not dumped after being picked.
However we are talking about Trump who nobody could describe as caring about norms.
On the other hand Trump never admits mistakes.
Vance could be pushed to say something like, well you know my wife Usha needs more attention from me at home to care for our white I mean Indian children.
It's obvious that Usha still hates Trump's guts.
Not much of a clue but in the grifter's most recent rally in Atlanta, Vance's warmup speech was unusually brief.
Also impossible to forget when Trump was asked if Vance was ready to be president if needed, Trump deflected and never said yes. He obviously isn't.