Let's make this perfectly clear. the absolute best McMullen can realistically do would be if he gets paid public endorsement or other show of support from Romney, in which case he might, repeat might, drawing of modern too Conservative Republican voters to throw Utah to Hillary. Maybe. Any talk of McMullen carrying Utah is grossly unrealistic
A bold prediction, but I hope you realize you're explicitly saying the polling is massively incorrect.
I saw the most recent poll showing him competitive after making my post. That said, I will still stand by my statement. I'll slightly expanded to say that if major State Republicans come forward to support him even if for some reason Romney stands on the sidelines, he still has that chance. That also said, third-party candidates inevitably recede come election day. He needs the timing of big-name State Republicans to come out for him in the next couple weeks or he won't win.