President Trump held an event at the White House Wednesday as part of his new initiative to promote youth sports.

Professional athletes like Mariano Rivera and Herschel Walker were in attendance to support the Sports and Fitness Day.

“My feeling on the anthem is I felt they should have been standing at the beginning,” Walker, the 1982 Heisman Trophy winner, reportedly said.

The new policy requires players to stand but also gives them the option to stay in the locker room during the anthem.

“We want people to be respectful of the national anthem,” NFL Commissioner Roger Goodell said earlier this month on the new policy. “We want people to stand. That’s all personnel, and to make sure they treat this moment in a respectful fashion. That’s something that we think we owe. We’ve been very sensitive on making sure that we give players choices, but we do believe that moment is an important moment and one that we are going to focus on.”