The case started on Dec. 3 when a Wyoming Highway Patrol trooper attempted to pull over a pickup speeding southbound on Interstate 25 in Laramie County.
Besides the prison sentence, Chief U.S. District Court Judge ordered Engavo to serve three years of supervised probation after his release from custody.
Federal law provides people can vote free from interference including intimidation and other acts to prevent or discourage people from voting or voting for the candidate of their choice.