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CHARLESTON, SC - JANUARY 17:  Democratic presidential candidates Martin OMalley (L), Hillary Clinton (C) and Senator Bernie Sanders (I-VT) participate in the Democratic Candidates Debate hosted by NBC News and YouTube on January 17, 2016 in Charleston, South Carolina. This is the final debate for the Democratic candidates before the Iowa caucuses.  (Photo by Andrew Burton/Getty Images)
CHARLESTON, SC - JANUARY 17:  Democratic presidential candidates Martin OMalley (L), Hillary Clinton (C) and Senator Bernie Sanders (I-VT) participate in the Democratic Candidates Debate hosted by NBC News and YouTube on January 17, 2016 in Charleston, South Carolina. This is the final debate for the Democratic candidates before the Iowa caucuses.  (Photo by Andrew Burton/Getty Images)

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Debate reality check: Who was telling the truth?

CNN's Tom Foreman takes a look at the Democratic candidates comments on big banks and Barack Obama.

Debate reality check: Who was telling the truth?

CNN's Tom Foreman takes a look at the Democratic candidates comments on big banks and Barack Obama.