I'm not familar with UT-04 but why is Love having so much trouble in an R+14 district?
I know Jim Mathison represented this area for a number of years but he was a conservative Blue Dog who was basically the Democratic version of Lincoln Chafee.
Matheson was helped not only for his Blue Dog views, but his last name as well (his father was a popular former governor). As for why Love seriously underperforms, I suspect that some voters may be racist? That's what other members have also suggested.
Even though it might be un-PC to say I've felt that some underlying racism might be the case why the Democrats are doing so well here.
Esp. given that her opponent is white and most likely Mormon.