Harris surges, Biden slips after debate: new poll

Senator Kamala Harris has received a surge in support among Democrats following last week's US presidential candidate debate while former vice president Joe Biden has slipped, according to a poll published Tuesday.Twenty percent of Democrats surveyed in the Quinnipiac University poll said they backed Harris, the junior senator from California, up from just seven percent in a June 11 Quinnipiac poll.Biden, who served as vice president under Barack Obama and has been seen as the frontrunner in the