Despite Sen. Elizabeth Warren alleging that Sen Bernie Sanders told her in 2018 that a woman could never be elected president, a video dated back to 1988 has emerged - where Sanders clearly says that a woman could be elected into the White House.

"The real issue is not whether you're black or white, whether you're a woman or a man. In my view, a woman could be elected president of the United States," Sanders said in the clip. "The real issue is whose side are you on? Are you on the side of workers and poor people, or are you on the side of big money and the corporations?"

During the recent primary debate, Sanders shot down Warren's claims.

"Well, as a matter of fact, I didn't say it," he said.

"I don't want to waste a whole lot of time on this, because this is what Donald Trump and maybe some of the media want," he said. "Anybody (who) knows me knows that it's incomprehensible that I would think that a woman cannot be president of the United States."

The tension between the two senators was evident on stage, as Sanders attempted to shake Warren's hand, but she appeared to ignore it.

"How could anybody in a million years not believe that a woman could become president of the United States?" Sanders asked. "If any of the women on this stage or any of the men on this stage win the nomination, I hope that's not the case, I hope it's me, but if they do, I will do everything in my power to make sure that they are elected in order to defeat the most dangerous president in the history of our country."

To which, Warren replied:

"Bernie is my friend, and I am not here to try to fight with Bernie... Look at the men on this stage. Collectively, they have lost ten elections," she added in what was the moment of the night. "The only people on this stage who have won every single election that they've been in are the women. Amy (Klobuchar) and me."