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CNN Poll: Harris and Warren rise and Biden slides after first Democratic debates
By Jennifer Agiesta
Donald Trump Jr. Shares, Then Deletes, a Tweet Questioning Kamala Harris's Race (Published 2019)
By Katie Rogers & Maggie Haberman
What the Democrats' Turn Leftward Means for the Party's Chances in 2020
By Isaac Chotiner
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Joe Biden called busing a 'liberal train wreck.' Now his stance on school integration is an issue.
By Michael Kranish & Laura Meckler
'Her ambition got it wrong about Joe': Harris faces debate backlash
By Natasha Korecki & Carla Marinucci
Kamala Harris: "Birther" tweet targets 2020 candidate, rivals rush to her defense
By Stephanie Ramirez