The National Association of Police Organizations sent a letter to Nike CEO Mark Parker to inform him that they are calling for a boycott of all Nike products.

TMZ Sports obtained the letter, which read, "In featuring Mr. Kaepernick in the 'Just Do It' campaign, Nike grossly insults the men and women who really do make sacrifices for the sake of our nation. We are calling on all our member officers, their families and friends to join in boycotting all Nike products."

Kaepernick's new "Just Do It" ad features the phrase "Believe in something. Even if it means sacrificing everything," referencing his protest for police brutality during the NFL's national anthem that essentially got him blackballed from the league. Since the release of the ad, some people have been destroying their Nike products in protest.

Source: TMZ