British Prime Minister Boris Johnson is rejecting calls to resign after he was fined for breaking U.K. COVID lockdown rules by attending a party for his birthday at 10 Downing Street in June 2020. Johnson becomes the first sitting British prime minister ever to be officially found to have broken the law while in office. Johnson’s birthday party was held at a time when the British government was barring residents from visiting sick relatives. British Chancellor Rishi Sunak and Johnson’s wife were also fined.