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.

In 2015, the name of the peak was changed during the Obama administration to reflect the traditions of Alaska Natives and preference of many Alaskans.

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.