Possibly. Trump won by getting people out voting who didn't vote in large numbers previously - particularly rural voters. Much of this had as much to do with protest as it did with Trump's "personality".
I have looked and can't see any polls that state how Americans would vote if Pence were to replace a dead Trump. I have read articles that suggest Pence is popular among Trump voters, and is less divisive so may appeal to more moderate Republicans as well.
I think Trump is the start of a dangerous direction for America. The real danger will come if someone of intelligence and extreme views takes the project to the next step.