[DJ Taylor]

"The White House’s announcement did not specify how Obama and Interior Secretary Sally Jewell will assert authority to change the mountain’s name without approval from Congress."

By authority of Obama's pen and his phone, of course, and Congress will just look the other way...again.

[GrootheWanderer]

I’m pretty sure the law that created the U.S. Board of Geographic names gives it the authority to make that change and no congressional action is needed.