Former Vice President of the United States Joe Biden joined the ABC show "The View" on Dec 13.

While he was there, he shared an emotional moment with co-host Meghan McCain as they discussed her father Sen. John McCain's brain cancer diagnosis.

Biden's eldest son, Beau, died in 2015 from the same brain cancer Sen. McCain has been diagnosed with.

Biden moved his seat to sit next to McCain, saying that her father is consulting one of the doctors Beau consulted after being diagnosed with glioblastoma. Biden consoled McCain and said, "There is hope. And if anybody can make it, your dad (can)."

McCain and Biden held hands and both started tearing up when the former vice president talked about the hope that his son kept alive even after getting "this devastating diagnosis, like your dad."

"Beau is missing," Biden said. "But we've all decided to not talk about the loss as much as the inspiration he was to all of us."

Biden was also asked about rumors that he will run for president again in 2020, to which he did not give a concrete answer.

"If I were offered the nomination by the Lord Almighty today, I would say no because we're not ready, the family's not ready," Biden said, but added that if he were asked next year, "I may very well do it."