President Trump slammed the National Football League on Friday for not implementing penalties for players who protest during the national anthem.

Trump said Friday the “hemorrhaging” NFL has allowed players to become “the boss.” His comments follow Thanksgiving games in which New York Giants defensive end Olivier Vernon knelt during the anthem.

“Can you believe that the disrespect for our Country, our Flag, our Anthem continues without penalty to the players. The Commissioner has lost control of the hemorrhaging league. Players are the boss!” Trump tweeted Friday morning.

Can you believe that the disrespect for our Country, our Flag, our Anthem continues without penalty to the players. The Commissioner has lost control of the hemorrhaging league. Players are the boss! https://t.co/udXP5MR8BC — Donald J. Trump (@realDonaldTrump) November 24, 2017

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A handful of players have continued to kneel during games as the NFL season enters its 12th week.

Trump, who had criticized players who kneel as a form of protest during the campaign, in September suggested NFL owners should fire players who kneel rather than stand during the national anthem. The comments, at a rally, started a feud between Trump and the players who began protesting in unity during the anthem at games.

The NFL said last month it has no plans to implement a ban on kneeling during the anthem. NFL spokesman Joe Lockhart said the commissioner planned to speak to the teams and owners “about how to use our platform to both raise awareness and make progress on issues of social justice and equality in this country.”