Arizona Republican Sen. John McCain passed away at age 81 on Saturday. McCain's death comes after a yearlong battle with brain cancer, reports The Hill.

An Overview of McCain's Passing

McCain's family announced his decision to stop accepting medical treatment for his glioblastoma about 24 hours before his death. They cited the inevitability of the "progress of disease and the inexorable advance of age."

McCain died at 4:28 p.m. with his family by his side, according to a statement from his office.

McCain's service in the U.S. Senate and his status as a decorated war hero prompted bipartisan mourning of his passing. Both Republican and Democrat leaders issued statements via social media and provided their condolences to the McCain family.

Paying Tribute to McCain

At this time, McCain's body will rest in state in Washington, D.C.'s Capitol Rotunda. The senator's funeral will take place at the Washington National Cathedral before his burial in Annapolis, Maryland.

McCain asked former Presidents George W. Bush and Barack Obama to give eulogies at his funeral. While Vice President Mike Pence's presence was also requested at the Arizona senator's funeral, President Donald Trump's was not. McCain and Trump frequently sparred with one another shortly before the passing of the former.

On Saturday night, McCain's body was transported to a North Central Phoenix mortuary. Upon its arrival, crowds awaited, passionately professing their love for the recently deceased senator.

McCain earned respect during his time as a prisoner of war in Vietnam, even refusing early release for the sake of not abandoning his fellow soldiers. Later, McCain's political service earned him the title of a GOP "maverick."

Shortly after the announcement of his death, various political leaders posted the following messages on social media:

https://twitter.com/LindseyGrahamSC/status/1033515753981534208

https://twitter.com/BarackObama/status/1033521851312623616

https://twitter.com/HillaryClinton/status/1033537315417800704

https://twitter.com/cindymccain/status/1033516318924763136

Trump also tweeted his own regards:

https://twitter.com/realDonaldTrump/status/1033515425336885248

However, some of Trump's critics slammed the president for his tweet, noting his past criticisms of McCain and his military service:

https://twitter.com/kathygriffin/status/1033517218481356800

https://twitter.com/KayakTheRiver/status/1033580847356694528

Finally, McCain's daughter Meghan posted the following statement, which paid tribute to her father's influence on her life:

https://twitter.com/MeghanMcCain/status/1033514757544767488