♪ ♪ >> tucson was the first mass shooting during my presidency. >> a gunman appeared at the front of one of the theaters. >> and sadly, it is then repeated. >> one or more suspects walked into a social -- >> over and over. >> the gunman entering the emanuel -- >> and over and over and over again. >> one of the biggest mass shootings in american history at the pulse nightclub. >> in 2013 i started an organization to make our country safer. >> we knew that the progress in congress and in the white house would be difficult. >> difficult. >> but that we had this opportunity in states across the country. ♪ ♪ >> gabby set forth a strategy to