Given McMullin’s Mormon faith, you would think he would have a built-in base of support among LDS Church members. You would be (mostly) wrong. Trump’s support remains solid compared to McMullin, which is puzzling because the lewd videotape of him bragging about groping women prompted the LDS Church-owned Deseret News to write an editorial calling for Trump to withdraw from the race.
McMullin leads Trump among “very active” LDS voters 43-31%.

Surprisingly, “somewhat active” Mormons prefer Trump by 15-points, 37-22%

Hillary Clinton leads among “not active” members of the LDS Church. The Democratic nominee gets 36% of this group, while Trump has 33%. McMullin only gets 13% support here.

Catholics prefer Hillary Clinton to Donald Trump 55-26%. McMullin only gets 5%.

Protestants pick Trump over Clinton, 45-37%. McMullin is at 8%.