In 2009, following the death of Sen.
While Trump and McCain had an infamously contentious relationship - including the time when the then-presidential candidate mocked the Arizona Republican for getting captured while fighting in the Vietnam War - the president did not bury the hatchet after McCain's passing.
The absence of a formal communique from the White House has raised eyebrows and was all the more conspicuous after Vice President Mike Pence along with most of the cabinet, Press Secretary Sarah Sanders and all the living former presidents had issued their own statements over the weekend. McCain was a member of the American Legion and retired from the U.S. Navy at the rank of captain.
Jeff Colyer has ordered flags to be flown at half-staff from sunrise to sunset Monday in honor of U.S. Sen.
The federal code states that the flag shall be lowered on the day of death and the following day for a sitting member of Congress.
"There was no official proclamation from President Trump (as he has done in the past for other notable figures passing)", she added.
McCain was held captive as a prisoner of war in Vietnam for more than five years, and spoke out on behalf of the military and veterans throughout his life.
Throughout McCain's illness, Trump continued to publicly snub him - including at a recent appearance in which the president declined to say McCain's name when signing a bill that was named for him.
During the time he remained active in the Senate, McCain also expressed deep misgivings about Trump's job as President, criticizing his handling of world affairs and the example he has set for the country.
McCain was one of Trump's sharpest critics, and made clear in one of his final wishes as he struggled with brain cancer that he did not want the president to attend his funeral.
The White House didn't immediately respond to a request for comment.