Good question. Have not heard it asked yet. In my non-expert opinion it would be a line on a form that states “I will not engage or support Islamic Terrorism, or any other forms of Terrorism. Furthermore I promise to aid and assist the U.S. government in preventing Terrorism.”
Of course I am no expert, and have no inside information. Additionally any verbiage would need to be vetted by many organizations. Not sure what others think, this is just what I think about one of the most contentious issues of the campaign.