(FILES) This handout photo distributed by the White House and taken in 1978 shows US President Jimmy Carter reading at his desk in the Oval Office at the White House in Washington, DC. From Gerald Ford's catastrophic Soviet gaffe to Ronald Reagan's witty remark about his age and Joe Biden's infamous implosion, US presidential debates have been jaw-dropping in every sense of the word. (Photo by Karl SCHUMACHER / WHITE HOUSE / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / WHITE HOUSE/ KARL SCHUMACHER " - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS / TO GO WITH AFP STORY: "US presidential debates over the years: gaffes, chaos, scandals" (Photo by KARL SCHUMACHER/WHITE HOUSE/AFP via Getty Images)