“She came to raise a concern, and he said let’s talk about that later,” said Sanders campaign manager Faiz Shakir in a brief interview with The Washington Post. Shakir declined to provide further details about the conversation, the video of which has been widely shared on social media.

Tensions appeared to remain high immediately after the conclusion of the debate, when Warren (D-Mass.) and Sanders (I-Vt.) were caught on video holding a brief yet animated discussion after Warren declined to shake Sanders’s hand…

The video of the post-debate exchange shows Sanders extending his hand as Warren approaches him onstage. Rather than shaking it, Warren clasps her hands together and speaks to Sanders. He responds, as Tom Steyer walks toward them. Both Warren and Sanders have serious expressions on their faces.