[John Farson]

Bush's misguided faith in the power of big government (the Ring) make him more akin to Isildur.

"Of course my story is not an allegory of Atomic power, but of Power (exerted for domination)"
--J.R.R. Tolkien
_The Letters of J.R.R. Tolkien_ p. 246 (1995)

[Elenya]

Bush aside, Tolkien is perfectly aware of the weakness of men (as personified by Isildur), but in the end, he believes they're Middle Earth's only hope. Men's redemption will save Middle Earth.