Kieron Suckling

The America the Beautiful Pass features side-by-side portraits of George Washington and President Trump.

Some park goers have responded by covering Trump's face with protest stickers.

The Center for Biological Diversity is suing, noting that by law, the cards should feature a winning photo of a national park.

Executive Director Kieron Suckling says they've heard from thousands of park goers.

The Interior Department says the new rule is simply meant to protect against fraud.

Windsor Johnston, NPR News, Washington.