The incident at Heller's office follows similar incidents involving other GOP senators in recent weeks. Over the July Fourth recess, a protester was arrested outside the Tucson office of Sen. Jeff Flake, R-Ariz., after asking a staffer, "You know how liberals are going to solve the Republican problem? They are going to get better aim." And an Omaha man was arrested this month after walking into an Iowa motorcycle shop and saying that he "could kill" Sen. Joni Ernst, R-Iowa, who was scheduled to visit the shop the next day.