President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE is calling for NFL players to stand during the national anthem at games on Sunday.

After a day in which he fervently defended his administration's response to Hurricane Maria in Puerto Rico, Trump wrote on Twitter Saturday evening that it is "very important" for professional football players to "always" stand during the anthem.

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"Very important that NFL players STAND tomorrow, and always, for the playing of our National Anthem. Respect our Flag and our Country!" he tweeted.

Very important that NFL players STAND tomorrow, and always, for the playing of our National Anthem. Respect our Flag and our Country! — Donald J. Trump (@realDonaldTrump) September 30, 2017

The president ignited a public furor last week when he said during a rally in Alabama that players who kneel in protest during the anthem should be fired and urged supporters to walk out of NFL games when athletes take a knee.

NFL players across the country responded to Trump's remarks last Sunday by kneeling or linking arms during the national anthem in a show of solidarity.

Since then, Trump has called for an end to the demonstrations, which were intended to protest racial inequality and police misconduct. Even as he faced pressure this week over the administration's relief efforts in Puerto Rico, the president said it was "very important" to address the NFL protests.