Biden tries to limit the damage from debate blow

In an effort to steady his presidential campaign, former Vice President Joe Biden engaged in some furious damage control on Friday, a day after rival candidate Kamala Harris hurt him in the most dramatic clash so far of the 2020 election campaign.Addressing an African-American advocacy group in Chicago, Biden defended his record, saying he had a "lifetime commitment to civil rights".At the Democratic debate in Miami on Thursday, Harris, a black U.S. senator from California, tore into Biden for o