The story not told here, is that undeclared voters may also go the polls, become declared Repubs and cast a vote.
Since there have been no highly contested democratic primaries in recent memory, I doubt that there are very many declared Dems in the State. Mostly voters are declared Republicans and undeclareds...In this highly contested race, polls show nothing, nothing about a possible influx of undeclareds to the polls and what their impact may be.
I tried on the net to find the party registration stats in Utah and totally failed. They were nowhere to be found. Odd.