So, why exactly was Elmo on stage with Boris Johnson?

LONDON, ENGLAND - DECEMBER 13: Prime Minister Boris Johnson, standing near a fellow candidate dressed as Elmo, speaks at the vote declaration for his Uxbridge and South Ruislip constituency on December 13, 2019 in Uxbridge, England. Exit polls predicted the Prime Minister, who has held the Uxbridge and South Ruislip seat since 2015, will emerge from this general election with a governing majority, his aim when he called the first UK winter election for nearly a century. Election results from across the country are being counted overnight and an overall result is expected in the early hours of Friday morning. (Photo by Dan Kitwood/Getty Images)