Kamala Harris Vaults Into Second Place as Joe Biden Slips After First Debate

(Bloomberg) -- The first debate shuffled the Democratic presidential race, vaulting Kamala Harris into second place and highlighting vulnerabilities for front-runner Joe Biden.Meanwhile, Elizabeth Warren continues to rise and 2016 runner-up Bernie Sanders is slipping as voters search for alternatives in the historically large field of candidates.That’s the conclusion from four polls taken since last week’s debate that also show those four candidates clearly make up the top tier at th