Pence has nothing to take down Trump with. He doesn’t have the dynamic genius that Trump has.
He’s “deeply religious”. Yet he’s in politics and wants to be POTUS.
Pence has zero chance of anything but electoral embarrassment if he continues.
Trump might win the nom (it will be close), and has zero chance of anything but electoral embarrassment in the general. And, it's mostly Trump's fault as he just cannot act presidential, diplomatic, wise, or in control of his actions.