President Donald Trump says he’s changing the official name of Alaska’s — and North America’s — tallest peak from Denali back to Mount McKinley. It’s the latest chapter in a long struggle over what the mountain should be called.

Mount McKinley was officially renamed Denali in 2015, ending a century-long naming controversy. The decision was announced by then-Secretary of the Interior, Sally Jewell, citing a 1947 law allowing name changes when the U.

The 47th president is wading back into a century-long dispute over the name we give to North America’s tallest mountain