The Women of 'The View' -- Then & Now

McCain was moved to tears during Biden's visit, as she asked for words of encouragement.

It was an emotional morning on "The View" Wednesday, as host Meghan McCain broke into tears discussing her father John McCain's battle with glioblastoma with former Vice President Joe Biden. Biden's son, Beau Biden, passed away from his fight with brain cancer in 2015.

"Your son Beau had the same cancer my father was diagnosed with six months ago. I think about Beau almost every day and I was told that this doesn't get easier," said McCain, "but you cultivate the tools to work with this and live with this."

As she teared up, Biden switched seats with Sunny Hostin to sit next to McCain and hold her hand as he offered her and everyone watching some words of hope.

"One of the things that gave Beau courage was John. Your dad took care of my Beau. Your dad became friends with Beau and Beau talked about your dad's courage," said the fomer VP. "If any of you have somebody who is diagnosed with glioblastoma, which is about as bad as it gets, there's breakthroughs that are occurring now. It can happen tomorrow."

He went on to stress the medical developments happening everyday, adding, "Our prayer was the same one that Meghan's gonna have, that the science is going to outrun the disease and it's getting closer and closer."

"There is hope," he continued, saying that "if anybody can make it," it's McCain's father.

"The thing that I found was and Beau insisted on and your dad's gonna insist on, is you gotta maintain hope. You have to have hope. Every day Beau would say, let's make a deal, we are not going to talk about percentages dad," Biden added. "We gotta just keep moving like this is gonna happen. It's gonna happen. I swear guys, we are gonna beat this damn disease."

"Thank you for your compassion, you're a great hope to me and everyone else in the country right now," McCain said before throwing to a commercial. "Thank you so much. We'll be right back and I promise I'll stop crying."

The Republican senator from Arizona revealed his diagnosis with glioblastoma in July. His diagnosis led to Meghan having her wedding with Ben Domenech in November. "We were originally going to elope before everything happened with my dad, but obviously all these things have taken on new meaning," she told PEOPLE. "There was something about Ben being there for me, at my father's treatments. I was like, 'This is love.' I felt this overwhelming sense of time and my own mortality. We ended up saying, 'Let's do this now.'"

At the time, John added, "I'm getting treatment, and my progress is steady and good. People are saying, 'I hope you can get over this.' I believe I will."