WASHINGTON — The Navy says it is reviewing whether service members violated Defense Department policy or regulations by wearing a uniform patch with the words “Make Aircrews Great Again” during President Donald Trump’s visit to their ship in Japan.

The phrase emblazoned on the patch, along with what appeared to be a likeness of Trump, is a play on his campaign slogan.

President Donald Trump speaks to U.S. servicemen aboard the amphibious assault ship USS Wasp at the U.S. Navy's Yokosuka base in Japan on May 28, 2019. (Eugene Hoshiko/AP)

The military has dress codes and regulations against partisan political acts while in uniform.

In a brief statement Tuesday, the Navy said only that the matter was under review by Navy leadership to ensure that the wearing of the patches did not violate policy or regulations.

Trump visited the amphibious assault ship Wasp on Tuesday before returning to Washington from four days in Japan.

President Donald Trump greets service members on board the amphibious assault ship Wasp in Yokosuka, Japan, on Tuesday. (Eugene Hoshiko/AP)