I don't believe William McKinley ever went to Alaska at all, let alone the mountain. He certainly had nothing to do with its naming, which was unofficially started by a Seattle gold prospector (from New Hamster) who had heard that McKinley was running for POTUS, and then officially in 1917 by the signature of Woodrow Wilson. But the locals always called it Denali and the Alaska Board of Geographic Names has officially called it that since 1975.
By contrast, Mount Mitchell, visible from my front porch, was named for a UNC professor who explored it and established its height as the tallest peak in eastern North America, just as Clingman's Dome, the second-highest in the chain, was named for its explorer. Mitchell and Clingman had an ongoing argument about which was taller, which Mitchell won.
We gave the little guy to Tennessee.
TNHarley
So in short the naming of "Mt. McKinley" recalls the self-described strategy in the naming of Monty Python's Flying Circus:
- Because as far as anyone knew there was no-one called Monty Python;
- Because it had nothing to do with flying;
- Because it was not a circus