Why GOP efforts to turn Sanders supporters off Biden don't appear to be working

At several points during the first presidential debate Tuesday night, President Trump tried to drive a wedge between the Democratic Party's centrist and left wings. Sean Sullivan, a CBSN political contributor and national politics reporter for the Washington Post, spoke to CBSN's "Red & Blue" host Elaine Quijano about why the strategy to pull votes away from Biden doesn't seem to be working.

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