The 'Rats punked you guys again.
The mountain was evidently named while Alaska was still a US territory, corrections welcome. But since the states have never delegated to the feds, expressly via the Constitution, the specific power to name intrastate places, unless Alaska agreed to call it Mt. McKinley when the state was admitted to the Union, Alaska has the 10th Amendment-protected power to call it anything that they want to imo. Likewise for geographical places in other states.
It was Denali for a thousand years (or so.) the ONLY people who want it named McKinley are from Ohio.
This is a non issue.