A campaign staffer was arrested early Sunday morning at a Draper hotel after witnesses told police he assaulted fellow employees at an outdoor cookout.Booking documents filed by Draper Police show that Eduardo Folk, 30, was arrested for Assault, Public Intoxication, and Disorderly Conduct. The investigation began around 2:30 a.m. when officers were dispatched to the LivAway Suites at 13673 South 600 West on reports of a disturbance.Upon making c…