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gop debate analysis panel 2 tapper lead_00002305
gop debate analysis panel 2 tapper lead_00002305

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    Fmr. Obama adviser: Rubio would be toughest to beat

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Fmr. Obama adviser: Rubio would be toughest to beat

Dan Pfeiffer, former senior adviser to President Obama, tells CNN's Jake Tapper that if he was working for Hillary Clinton or Joe Biden, he would be most worried about Sen. Marco Rubio.

Fmr. Obama adviser: Rubio would be toughest to beat

Dan Pfeiffer, former senior adviser to President Obama, tells CNN's Jake Tapper that if he was working for Hillary Clinton or Joe Biden, he would be most worried about Sen. Marco Rubio.