There is a reason behind the law.In the institution’s early years, Representatives and guests in the galleries routinely donned their hats while the chamber was in session—a custom that hearkened to British Parliament. http://artandhistory.house.gov/highlights.aspx?action=view&intID=430
John M. Patton of Virginia defended “the really harmless but apparently indecorous practice of wearing our hats” as a manifestation of the House’s resolute rejection of presidential meddlesomeness.”
LOLOLOL - I doubt I am related to this guy, but I sort of wish I was.