Because the Utah Republican Party holds a closed primary — and many of Republican-controlled Utah’s elections are decided in the primary — each year there tends to be speculation of “party raiding,” or Democrats switching their affiliation to Republican. But election registration statistics don’t show widespread party raiding — not this year, and not even before the Utah Legislature passed a bill in 2021 to move up party affiliation deadlines in an effort to cut off voters’ ability to switch parties months before the primary. Utah Lt. Gov. Deidre Henderson released updated registration statist…