Meghan McCain breaks down crying during first day of co-hosting 'The View' while talking about dad's cancer

Meghan McCain had an emotional first day at work.

The 32-year-old political contributor joined the women of The View on Monday as the newest co-host, and had to hold Sunny Hostin's hand when the subject turned to the health issues that her father, Sen. John McCain, is facing.

MORE: John McCain Reveals His Devastating Brain Cancer Prognosis -- 'Now We're Going to Do What We Can'

Meghan started to tear up when talking about her dad's stage 4 brain cancer. "I can't believe I'm freaking crying already," she said. "When you hear cancer, a nuclear bomb goes off in your life. No matter who you are. I didn't realize how intense and disruptive and scary and hopeless and chaotic you would feel all day long."

The new co-host then vowed to make it her life's mission to find a cure for cancer, in particular the one that has plagued her father. 

See photos of Meghan McCain:

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WATCH WHAT HAPPENS LIVE -- Pictured: Meghan McCain -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
Meghan McCain, daughter of U.S. Senator John McCain and host of "Raising McCain" poses during a photocall during the annual MIPCOM television programme market in Cannes, southeastern France, October 8, 2013. The International film and programme market for TV, video, cable and satellite (MIPCOM) opens from October 7 to October 10 on the French Riviera. REUTERS/Eric Gaillard (FRANCE - Tags: ENTERTAINMENT)
Meghan McCain, daughter of U.S. Senator John McCain, and executive producer and host of the television show "Raising McCain" speaks during the Pivot television portion of the Television Critics Association Summer press tour in Beverly Hills, California July 26, 2013. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Cindy McCain (C), wife of U.S. Republican presidential candidate John McCain, discusses the placement of a teleprompter next to her children Meghan (L), Jimmy (2nd L), Jack (2nd R) and adopted daughter Bridget (R) during McCain's walkthrough of the podium at the 2008 Republican National Convention in St. Paul, Minnesota September 3, 2008. REUTERS/Rick Wilking (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)
Republican presidential candidate U.S. Senator John McCain (R-AZ) is joined onstage by his wife Cindy (C) and daughter Meghan (R) following a debate among the Republican presidential candidates at the University of New Hampshire in Durham,New Hampshire, September 5, 2007. REUTERS/Brian Snyder (UNITED STATES)
WATCH WHAT HAPPENS LIVE -- Pictured: Meghan McCain -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
US Republican presidential candidate John McCain's daughter Meghan (L), his mother Roberta (C) and his adopted daughter Bridget (R) attend the opening session of the 2008 Republican National Convention in St. Paul, Minnesota September 1, 2008. REUTERS/Brian Snyder (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)
NEW YORK, NY - NOVEMBER 13: Meghan McCain attends the 2015 Trevor Project NextGen Fall Fete at Marquee on November 13, 2015 in New York City. (Photo by Cindy Ord/Getty Images)
NASHVILLE, TN - JUNE 12: Ty Herndon and Meghan McCain speak onstage at The Concert For Love And Acceptance at City Winery Nashville on June 12, 2015 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for Concert For Love And Acceptance)
WATCH WHAT HAPPENS LIVE -- Pictured: Meghan McCain -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - NOVEMBER 13: Meghan McCain attends the 2015 Trevor Project NextGen Fall Fete on November 13, 2015 in New York City. (Photo by Robin Marchant/Getty Images)
NEW YORK, NY - NOVEMBER 13: Meghan McCain attends the 2015 Trevor Project NextGen Fall Fete on November 13, 2015 in New York City. (Photo by Robin Marchant/Getty Images)
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MORE: Meghan McCain Reacts to Dad John McCain's Brain Cancer Diagnosis -- See Other Celebrity Responses

Meanwhile, Senator McCain was watching Meghan's first day on The View and proudly tweeted his support. "Congratulations @MeghanMcCain on your first day on @TheView," he wrote. "Our family couldn't be prouder of all that you continue to accomplish."

Whoopi Goldberg seemed thrilled to have Meghan joining the morning talk show, and the feeling was mutual. Meghan referred to the host as the "first lady" of the program and called her a mentor and inspiration to women.

Meghan, a Republican, also joked with Joy Behar that she doesn't think they will "agree on anything."

See photos of John McCain:

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John McCain and family through the years
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John McCain and family through the years
Ok one more. @senjohnmccain with me at our first Christmas as a married couple.
@senjohnmccain @zelda.frenchie.1 and our two boys Jack and Jimmy enjoying the morning at the Navy Memorial.
@DBacks game with @meghanmccain and. @senjohnmccain
So many years ago. @meghanmccain @senjohnmccain at her Columbia University graduation.
One of my favorite family photos. An oldie but a goody! @senjohnmccain @meghanmccain
Thank all of you for the wonderful thoughts. @senjohnmccain is doing well. We as a family will face the next hurdle together. One thing I do know is he is the toughest person I know. He is my hero and I love him with all my heart.
The highlight of my day. ❤️🍴🇺🇸
My rock @cindymccain ❤️❤️❤️
Happy early birthday Dad - I love you with all my heart. ❤️🇺🇸🌵🎂🍰
After dinner talks with Dad 🌵❤️🇺🇸
Hiking the eclipse with Dad 🌵🌙
To everyone who has sent me and my family such kind words of strength and prayers, thank you from the bottom of my heart, it really has been helping me. We start my fathers last (first round) of radiation and chemotherapy today. This last month has easily been the most challenging and difficult of my life. I come from a long lineage of warriors and I have never been more grateful for the strength and fortitude that has been passed down to me, I am relying on it now more than ever. My natural inclination is always to be open and share my life but at the moment I am still in a place where I just want and need to be around my family and am asking for your understanding and patience. To those of you out there living with #GBM or who have a family member or loved one living with #GBM, you are my absolute heroes. We are in this fight together, sending you all love and light. #FUCKCANCER
Happy Fathers Day to my father @senjohnmccain. This picture is how I always think of you, relaxed, in Arizona, grilling us ribs and listening to Frank Sinatra. Thank you for teaching me how to love life and seize every moment. Thank you for exposing me to the world (it's good and bad) and teaching me about character, conviction and having true grit. Finally thank you for always giving me something to believe in, in a world where it has become increasingly harder to find. I love you with all my heart. 🇺🇸❤️
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PHOTOS: Whoopi Goldberg Greets 'Sister Act' Fans Dressed as Nuns in Celebration of Film's 25th Anniversary

Before cutting to commercial, Goldberg had a message for Meghan's parents, saying into the camera, "We got her. I just want you and Cindy to know she's in good hands here."

Bravo's Andy Cohen also showed his support for the new co-host of The View, tweeting during the show: "This is great casting. I'm excited to watch. Very cool."

Meghan responded: "Thank you so much @Andy - really appreciate it! ❤️❤️❤️❤️"

MORE: Jedediah Bila Abruptly Leaves 'The View' After a Year on the Talk Show

Meghan's first day comes less than a month after Jedediah Bila exited the program after serving as the conservative voice on the panel for a year. 

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