Kamala Harris takes bite out of Joe Biden in fiery debate

Former US vice-president urged to pass torch as he faces younger generation of Democrats
Senator Kamala Harris speaks during the second night of the first Democratic presidential candidates debate in Miami, Florida, U.S. June 27, 2019. REUTERS/Mike Segar     TPX IMAGES OF THE DAY
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Joe Biden, the frontrunner in the race to be the Democratic presidential candidate for 2020, has come under attack from his younger colleagues during a fiery televised debate which saw him subjected to his toughest scrutiny of the campaign so far.