PHOTO: CNN
Now playing
01:07
Watch moment between Bush, Michelle Obama
snl.fauci.vaccine.orig_00005420.png
snl.fauci.vaccine.orig_00005420.png
Now playing
01:24
'SNL' has 'Dr. Fauci' helping people get vaccinated
The Pokémon Company announced new games during its 25th Anniversary Celebration
PHOTO: The Pokémon Company
The Pokémon Company announced new games during its 25th Anniversary Celebration
Now playing
01:01
See the new Pokémon games coming soon
PHOTO: nickelodeon/from youtube
Now playing
01:33
'Real World,' 'Frasier,' 'Spongebob:' See the reboots coming to this new streaming service
Now playing
02:28
Fisker is making its next electric vehicle with Foxconn
Airbnb CEO Brian Chesky speaks onstage during "Introducing Trips" Reveal at Airbnb Open LA on November 17, 2016 in Los Angeles, California.  (Photo by Mike Windle/Getty Images for Airbnb)
PHOTO: Mike Windle/Getty Images for Airbnb
Airbnb CEO Brian Chesky speaks onstage during "Introducing Trips" Reveal at Airbnb Open LA on November 17, 2016 in Los Angeles, California. (Photo by Mike Windle/Getty Images for Airbnb)
Now playing
03:51
Airbnb CEO: This is how we outperformed our competitors in 2020
PHOTO: ABC's "Jimmy Kimmel Live!"
Now playing
01:46
Watch people struggle to identify second gentleman Doug Emhoff
PHOTO: "The Late Late Show with James Corden" / Youtube
Now playing
01:37
See Prince Harry and James Corden tour LA on open-air bus
Now playing
02:44
Is T.J.Maxx recession-proof?
PHOTO: CBS
Now playing
02:23
What Tiger Woods said about the Masters just days ago
Now playing
01:36
Michael Bolton wants you to break up with Robinhood
(CNN) —  

Former President George W. Bush and former first lady Michelle Obama shared a sweet moment at Sen. John McCain’s memorial service Saturday.

McCain, who died August 25 at the age of 81, was honored in a memorial service at the Washington National Cathedral, where Democrats and Republicans came together to celebrate his decades of public service.

Tributes from Bush and former President Barack Obama, who eulogized the late Arizona Republican at the senator’s request, were among the highlights, as were daughter Meghan McCain’s tearful remarks, in which she contrasted her father’s legacy with the rhetoric of President Donald Trump, who was not invited to attend the service.

But when former Sen. Joe Lieberman of Connecticut was reminiscing about his longtime friend, the cameras cut to the front row and caught Bush handing something to the former first lady, who softly thanked him.

The clip of the exchange went viral Saturday, garnering hundreds of thousands of retweets and likes and an outpouring of warm comments. Many initially thought Bush handed Michelle Obama a piece of candy, but Bush spokesman Freddy Ford confirmed to CNN on Sunday it was actually a cough drop – a revelation that he also tweeted out.

Bush and Obama are surprisingly close considering their political differences, and they have often been seated next to each other and photographed together at formal events.

George W. Bush receives a hug from Michelle Obama in September 2016.
PHOTO: Zach Gibson/AFP/Getty Images
George W. Bush receives a hug from Michelle Obama in September 2016.

A photo in September 2016 of their warm embrace at the opening ceremony for the Smithsonian National Museum of African American History and Culture also went viral.

In an interview last year with People magazine, Bush credited the former first lady’s appreciation of his sense of humor as a key reason for their friendship.

“She kind of likes my sense of humor. Anybody who likes my sense of humor, I immediately like,” Bush told the magazine. “When I saw her, it was a genuine expression of affection.”