Elizabeth Warren joined Joe Biden and Bernie Sanders on the debate stage tonight, and the night started off with an awkward handshake.

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Warren entered and shook Biden’s hand, and Sanders appeared to be preparing to shake a hand to his left, but there was no one there.

He finally awkwardly shook Warren’s extended hand.

The moment came after the two traded jabs this week over a claim that Sanders privately told Warren a woman couldn’t be elected president, a smear he denied.

At the conclusion of the debate, Warren refused to shake Sanders’s hand.

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Sanders stuck out his hand, and Warren didn’t oblige. The two appeared to have an icy conversation, and Sanders walked away.