"What?" Sanders replied.
"I think you called me a liar on national TV," Warren said again.
"You know, let's not do it right now," Sanders said. "If you want to have that discussion, we'll have that discussion."
"You called me a liar," Sanders said. "You told me — all right, let's not do it now."
Before the exchange, Warren, 70, had refused the offer of a handshake from Sanders, 78.”