On August 25, after a year-long battle with glioblastoma, a form of brain cancer, GOP Senator John McCain passed away.

The politician and former prisoner of war's office released a statement confirming the sad news.

"Senator John Sidney McCain III died at 4:28pm on August 25, 2018. With the Senator when he passed were his wife Cindy and their family. At his death, he had served the United States of America faithfully for sixty years."

The news came just a day after McCain's family revealed that he has made the decision to end his treatment.

The statement read:

Last year, Senator John McCain shared with Americans the news our family already knew: he had been diagnosed with an aggressive glioblastoma, and the prognosis was serious.In the year since, John has surpassed expectations for his survival.

But the progress of disease and the inexorable advance of age render their verdict. With his usual strength of will, he has chosen to discontinue medical treatment.

Our family is immensely grateful for the support and kindness of all his caregivers over the last year, and for the continuing outpouring of concern and affection from John's many friends and associates, and the many thousands of people who are keeping him in their prayers. God bless and thank you all.

As soon as news of McCain's demise broke, tributes started to pour in on social media. World leaders, including President Donald Trump as well as former U.S. presidents Barack Obama and George W. Bush, also took to Twitter to remember the late politician.

Trump sent out a tweet addressing McCain's death in lieu of an official statement as he has previously done for notable figures.

Multiple outlets have reported that the White House did draft a statement, but it never went out. As usual, the flags were lowered on the day of McCain's passing. U.S. code states that when a member of Congress dies, flags are to fly half-mast "on the day of the death and the following day."

Presidents have the power to extend this period of mourning, and many have done so in the past. In 2009, Obama ordered flags to be lowered for five days following the death of Senator Edward M. Kennedy.

However, President Trump did not ask for the flags to be flown half-staff after the two days were up. Flags at 1600 Pennsylvania Avenue were seen flying high shortly after midnight on Sunday. Now, many Americans are calling the extremely short tribute disrespectful.

Many believe that Trump isn't as invested in McCain's death because the late onetime Republican presidential nominee was an outspoken critic of his.

Even after McCain's diagnosis was made public, their feud continued. The Senator didn't have very good things to say about Trump's presidency and foreign relations strategies, and he didn't sugarcoat his opinions.

Among other things, Trump maintained that McCain, who was imprisoned in Vietnam for nearly six years, was not a war hero because he was captured.

McCain, who will lie in state in Washington and Arizona as part of his cross-country funeral, will be buried at the Naval Academy in Annapolis. A spokesperson from this office confirmed that Trump will not be attending the Arizona Senator's funeral.

Presidents Bush and Obama are expected to speak at the funeral at Washington National Cathedral. Vice-President Mike Pence is likely to attend and represent the White House, according to CNN.