The party-run caucuses convene at 9 p.m. Eastern time and are expected to end at 11 p.m. Eastern time.
Only registered Republicans were eligible to participate, and those who had a valid excuse were allowed to cast an absentee ballot.
Utah Democrats are participating in a separate state-run presidential primary election, and polls close at 10 p.m. Eastern time.
The state primary, which will include races for state and congressional offices, will be held on June 25.
Organizations:
Utah Democrats