According to the passage, the final idea differs from the initial intent which was to carve western heroes into the mountain such as Buffallo Bill's and Lewis and Clark.
Only for the designer to make it more national centric rather by carving the faces of national heroes instead by carving tbe faces of George Washington ; Thomas Jefferson and Theodore Roosevelt.
The attorney general I believe who started the "red scare" is Robert K.Murray.
You can go to this site to get information on red scare and those involved.