Aside from the multitude of tourists (and excluding the predictable names of Cabinet secretaries and members of Congress, who frequently visit the White House) the records show two basic groups: government officials and advisors whose daily work sends them to the White House, and guests invited to official events.
As sad as this is for our nation, this action is necessary so that all of us can continue to not only uphold but teach those basic truths and basic right and wrong in our houses and most assuredly in this House.