The tallest mountain in the United States has been officially reverted to Mount McKinley, the U.S. Department of the Interior announced in a press release Friday. The official action comes four days after President Donald Trump signed an executive order on his first day back in office that also changes the name of the Gulf of Mexico to the Gulf of America.

Trump's decision is being met with resistance, as many Alaska lawmakers, including its two Republican Senators, have voiced opposition to the change.

The tallest peak in North America has been named Denali since 2015 when its name was officially changed under former President Barack Obama.