Speaking from across the Atlantic...
I don't know the precise history & politics but it's more to the point that such a scenically magnificent and scientifically interesting, major, feature should be preserved for all time so all may have a chance to see and appreciate it.
Theodore Roosevelt.
Leave it as it is. The ages have been at work on it, and man can only mar it.
Theodore Roosevelt.
Grand Canyon
Grand Canyon
Theodore Roosevelt who created the idea of making it a National Park.
The Grand Canyon
President Woodrow Wilson signed the legislation that changed it from a monument into a National Park in 1919. Theodore Roosevelt however is considered to be the founder, He named it a game preserve in the hope of protecting the natural environment and added National Forest lands to it in an effort to isolate it from human contact.
It was Theodore Roosevelt who first made an effort toward making it a National Park.
"The Grand Canyon fills me with awe. It is beyond cpmparison-beyond description; absolutely unparalled throughout the wide world," Theodore Roosevelt. That says it all.
It isn't a monument, but a national park. A monument is something made by man, but the Grand Canyon is natural by nature.
Some might say that the title belongs to Theodore Roosevelt who was a very strong advocate of National Park status for the park.