"The Cowboys' official Twitter account posted a message and photo soon after the anthem, stating "#FootballIsFamily".
Jones's joining his team to kneel is particularly noteworthy, as he has been in the recent past a strong critic of the national anthem protest begun by quarterback Colin Kaepernick. Technically, the Cowboys did both - kneeling before the anthem and then standing during it.
He claimed that the Dallas team was greeted by boos, which it was, but also that it was "the loudest I have ever heard".
The president said: 'Wouldn't you love to see one of these National Football League owner, when somebody disrespects our flag, to say, "get that son of a bitch off the field right now, out, he's fired - he's fired!'"
Cowboys veteran tight end Jason Witten valued not disparaging the anthem or flag.
The public address announcer at University of Phoenix Stadium addressed the crowd before the anthem, saying Cardinals players would lock arms during the playing of the song.
The Cowboys and Jerry Jones had an opportunity to take the high road and show America what is meant by the moniker 'America's Team, ' but they failed and failed miserably.
The#Cowboys knelt, briefly, before the anthem. Trump friend Robert Kraft stood in the owners box, hand over heart, before his New England Patriots played, but he said he was "deeply disappointed" in Trump's remarks.
The Cardinals gathered on the goal line as a team, some of them locking arms, during the anthem.
McCain said Sunday that the president never apologized for that comment, but that they are "very different people", and that the door is not closed.
"I respect everything the Cowboys do", he said. "They're respectful. They're the nation's team".