WASHINGTON — Jerry Jones may want to bench Dallas Cowboy players who don’t stand for the national anthem, but NFL owners could find themselves facing a First Amendment lawsuit if they punish players or coaches for their protests after taking government money into the private business of pro football.

The NFL is a private business – and the First Amendment only protects Americans from free speech abuses from the government. But legal experts differ on whether pro teams who play in publicly funded stadiums or who accepted government money in exchange for patriotic displays like the national anthem could find themselves legally exposed if they punish kneeling players.

The money exchanged between governments and pro football teams could mean that discipline enforced by the team could be “fairly attributed to a government entity, meaning the employer could not discipline someone for taking a political position,” Harvard Law School professor Mark Tushnet said.

A judge could find it “relevant that some of the stadiums have been constructed with public support and may get continuing public subsidies,” Tushnet said. “It may be relevant that some of these practices were instituted in cooperation with the national military.”

“If the government pays for the patriotic display and the firing is a result of the behavior being deemed insufficiently patriotic, it is conceivable a claim could then be articulated,” said Floyd Abrams, a First Amendment lawyer in New York.

The NFL has been embroiled in controversy over players using the national anthem before games as a platform for protest. Former 49ers quarterback Colin Kaepernick started the movement last season when he refused to stand during the anthem to protest racial inequality and police brutality. Kaepernick remains unsigned and wants to resume his career, but other players have picked up his cause and kneeled, sat or made other gestures during “The Star Spangled Banner.”

Jones, one of the NFL’s most powerful owners, has said the NFL can’t leave the impression that it tolerates players disrespecting the flag and said any Cowboys doing so won’t play.

“If you do not honor and stand for the flag in a way that a lot of our fans think that you should, if that’s not the case, then you won’t play,” Jones said Tuesday on a Dallas radio station.

Public money is inextricably linked with the NFL. The vast majority of stadiums were constructed or renovated with public money, including the Cowboys’ home in Arlington, Texas. The Taxpayer Protection Alliance rated AT&T Stadium as one of the most egregious abuses of taxpayer money, saying the cost to taxpayers has been about $444 million.

And the NFL was paid by the military for at least four seasons for its patriotic displays during pregame, as part of defense spending to market to potential recruits. After complaints from Arizona Sens. Jeff Flake and John McCain, the NFL in 2016 repaid the government more than $700,000 covering payments from four NFL seasons, 2012-2015, for activities including performances of the national anthem, full-field flag details and on-field color guard performances.

There is no guarantee that a First Amendment lawsuit would succeed against pro teams even if they have accepted government money, Tushnet said. Other legal experts dismiss the idea of any First Amendment lawsuit against NFL teams being successful. Rules for player conduct are also spelled out in the league’s rulebook, personal conduct policy and the collective bargaining agreement.

“If it is a private stadium, it is not a public forum and the person imposing the rule is not a government actor,” said Stephen F. Ross, director of the Penn State University Institute for Sports Law, Policy, and Research. “Even in public stadia, you do not have the right to free speech.”

Public funding of stadiums doesn’t change that, Ross said. He compared the funds to when governments provide subsidies to move an auto plant from one state to another.

“That does not convert the auto plant into a public facility,” Ross said. “It might be bad public policy to subside public stadia, but it doesn’t make them a public forum where you have a right to engage in free speech.”

Jones portrayed his statement as an employment issue rather than a First Amendment issue.

“I don’t want there to be any misunderstanding as to where I want the personnel of the Cowboys to be when we’re at the No. 1 workplace we have, which is the field and the sideline on game day.”