During an appearance for a U.S. Senate candidate in Alabama on Friday, President Trump blasted NFL players standing against America by taking a knee during the national anthem.

Campaigning for Luther Strange for the seat vacated by now-Attorney General Jeff Sessions, Trump waded into the controversy.

“We’re proud of our country. We respect our flag,” the president told the audience in Huntsville.

Trump doesn’t mince words about traitors kneeling during “National Anthem”
Mark me, Roger Goodell…
“You’re Fired!” If you don’t end it. pic.twitter.com/4nnmpgXmFD

— Maverick (@RodStryker) September 23, 2017

“Wouldn’t you love to see one of these NFL owners, when somebody disrespects our flag to say, ‘Get that son of a bitch off the field! He’s fired.’

“‘He’s fired!'” Trump shouted to a roaring audience.

The president’s slam comes one day after the stadium in San Francisco for a game between the 49ers and the Los Angeles Rams was less than half full.

Thursday night football. Time for kickoff. pic.twitter.com/SinMLDH6AD

— Lindsey Thiry (@LindseyThiry) September 22, 2017

“Time for kickoff,” LA Times reporter Lindsey Thiry tweeted.

In the second half, the seats were only about half full.

From my vantage point 3 minutes to go 2ND quarter. #49ers vs #Rams pic.twitter.com/pYbJPFNV6q

— Colin Resch (@colinresch) September 22, 2017