Captain Chesley "Sully" Sullenberger urged Americans to vote against President Donald Trump in a series of tweets citing the anonymously sourced report claiming the president mocked the military dead.

Sullenberger, whose life was made into a movie starring Tom Hanks, launched into the tirade on Friday evening.

"I am a veteran. I volunteered for military service during wartime. So did my father. His generation saved the world from fascism," said Sullenberger.

"In our travels, my wife Lorrie and I have always made it a point to visit military bases, hospitals and cemeteries, to meet and honor those who serve and have served our nation," he continued.

"I have long known that serving a cause greater than oneself is the highest calling, whether in the military or in civilian life. And I have always tried to be a voice of reason and to speak in a measured way. But this situation calls for a much more direct approach. It is time to call out egregious behavior for what it is," Sullenberger said.

"For the first time in American history, a president has repeatedly shown utter and vulgar contempt and disrespect for those who have served and died serving our country," he claimed.

"While I am not surprised, I am disgusted by the current occupant of the Oval Office. He has repeatedly and consistently shown himself to be completely unfit for and to have no respect for the office he holds. He took an oath of office that is similar to the one that each person takes who enters the U.S. Military. But he has completely failed to uphold his oath. Now we know why. He has admitted that he cannot comprehend the concept of service above self," Sullenberger added.

"He cannot understand selflessness because he is selfish. He cannot conceive of courage because he is a coward. He cannot feel duty because he is disloyal," he said.

He finished his statement with a link to The Atlantic article that made the accusations against the president using four anonymous sources.

"We owe it not only to those who have served and sacrificed for our nation," he concluded, "but to ourselves and to succeeding generations to vote him out."

Also on Friday, Jennifer Griffin of Fox News reported that two former senior Trump officials confirmed the claims in The Atlantic story. The president has forcefully denied the claims.

Here's more about the accusations:

Trump slams Atlantic article on his alleged comments about fallen U.S. service memberswww.youtube.com