Mr. Romney is expected to drive an unusually large voter turnout in Utah, perhaps garnering a record percentage of the vote. Ms. Love is careful to tie herself closely to Mr. Romney, even including his voice from an automatic phone call in a television ad, and Democrats worry that the state’s straight-ticket voting option on its machines will further enhance Ms. Love’s chances.
“I haven’t seen this popularity around a presidential candidate since Ronald Reagan,” said David Hansen, a former state Republican Party chairman who has run the re-election campaign of Senator Orrin Hatch. “There is a whole lot of enthusiasm for him out here, and she does pick up those coattails. I’d say any Republican candidate that is within three to five points of their opponent is going to win here.”