John McCain was a maverick and a fighter, never afraid to stand for his beliefs.
Since McCain's passing, there have been many tributes, including from the cast of SNL, and a notable lack of tributes from Donald Trump's White House.
Trump, who had traded bitter criticism with McCain since before the election, declared his order "a mark of respect".
The White House lowered its USA flag to half-staff, raised it back up and on Monday lowered it again after the death of Senator John McCain, in an unusual and confusing break with protocol on the passing of a national leader. The death of a vice president, chief justice, former chief justice or House speaker merits 10 days, and for a president or former president, the flag flies at half-staff for 30 days. It began when he graduated from the Naval Academy in 1958 and ended Saturday, when the Arizona senator died after battling brain cancer for more than a year. Trump initially tweeted condolences to McCain's family, but made no mention then of the Arizona Republican with whom he feuded for years.
Trump's White House lowered its flag on Saturday, then raised it back following the minimum period under law. That seemed to be the breaking point for a key Trump constituency, veterans.
The White House flag was lowered after McCain's death on Saturday - but it was once again at the top of the flagpole on Monday morning.
By day's end, Trump had done just that, with no immediate explanation from the White House.
The Richmond man, and former naval aviator, spent five and a half years with McCain has a prisoner of war in North Vietnam.
Finally, I have asked General John Kelly, Secretary James Mattis, and Ambassador John Bolton to represent my Administration at his services. Arizona Sen. McCain, the war hero who became the GOP's standard-bearer in the 2008 election, has died. Trump questioned the decorated Navy pilot's Vietnam heroism and chafed at McCain's vote to kill the president's "Obamacare" repeal.
Canadian Prime Minister Justin Trudeau called McCain "an American patriot and hero whose sacrifices for his country, and lifetime of public service, were an inspiration to millions".
One of those longstanding friendships is with legendary actor and director Warren Beatty, who once spoke to The Atlantic a bit about his relationship with McCain.
According to the Department of Veterans Affairs, the flag should be flown at half-staff "at all federal buildings, grounds and naval vessels in the Washington, D.C., area on the day and day after the death of a United States senator, representative, territorial delegate, or the resident commissioner from the Commonwealth of Puerto Rico".