‘What the Hell Are You Talking About?’: Colbert Stunned By Trump’s Bizarre Stair Ramble

EXCERPT:

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TRUMP: "Obama, I have zero respect for him as a president, but he would bop down those stairs I've never seen. Da-da, da-da, da-da, bop, bop, bop."
[clip ends]
COLBERT: "What the hell are you talking about?”