Teens behind octogenarian Gravel's long-shot 2020 campaign tweet from debate sidelines

FILE PHOTO: Twenty four 2020 Democratic presidential candidates are seen in a combination from file photos (L-R top row): U.S. Senators Bernie Sanders, Kamala Harris, Elizabeth Warren, Cory Booker, Amy Klobuchar, Kirsten Gillibrand, Michael Bennet and former U.S. Senator Mike Gravel. (L-R middle row): Former Texas congressman Beto O'Rourke, U.S. Representatives Tulsi Gabbard, John Delaney, Eric Swalwell, Tim Ryan, Seth Moulton, former HUD Secretary Julian Castro and former U.S. Vice President Joe Biden. (L-R bottom row): Mayor Pete Buttigieg, Former Gov. John Hickenlooper, Gov. Jay Inslee, Andrew Yang, Marianne Williamson, Mayor Wayne Messam, Montana Gov. Steve Bullock and New York City Mayor Bill de Blasio. REUTERS/Files/File Photo

SAN FRANCISCO (Reuters) - After former Senator Mike Gravel failed to make the Democratic debate stage this week, the two teens running the 89-year-old's long-shot U.S. presidential campaign used their spot on the sidelines trying to attract new supporters through social media.

David Oks and Henry Williams, both 18, spent Wednesday firing tweets from their seats in the debate's Miami audience, attacking the candidates speaking on stage.