President Trump continued his beef early Sunday with NFL players kneeling during the national anthem, suggesting fans boycott the games to bring an end to the protests and said the “League should back U.S.” by firing the athletes.

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“If NFL fans refuse to go to games until players stop disrespecting our Flag & Country, you will see change take place fast. Fire or suspend! ,” he wrote on Twitter.

The president then suggested that people are not tuning in to the games because of the protests by the pro athletes.

“NFL attendance and ratings are WAY DOWN. Boring games yes, but many stay away because they love our country. League should back U.S.,” he posted about a half-hour later.

Trump kicked off the scrimmage Friday night during speech in Alabama when he criticized former San Francisco 49ers’ quarterback Colin Kaepernick for kneeling during the playing of the national anthem and urged NFL owners to “Get that son of a bitch off the field right now!” when players follow his lead.

The president then ramped up his war or words to include NBA players by withdrawing an invitation for Stephen Curry, the Golden State Warriors’ MVP and a persistent Trump critic, to attend a White House ceremony recognizing the NBA champions.

That led to a flurry of NBA players to defend Curry and take a shot at Trump, including Cleveland Cavaliers LeBron James, who called Trump “U bum.”