Pence says that he never considered dropping off the Republican Presidential ticket. I think the appropriate questions are, why not? What is the line that Trump cannot cross? 

All my life the Republican party and it's religious right cohort have been the values and morality police. Even last night Trump mostly tried to make the claim that Hillary Clinton's values disqualify her to be President. What I am waiting to see is Republicans holding themselves, and particularly their Presidential nominee, to those same values.  

Oh, and I am pretty sure saint Reagan would not associate himself with the behavior that Trump displays.