…with this applause line: "The Iranian government is defying the world with its nucular ambitions, and the nations of the world must not permit the Iranian regime to gain nucular weapons." And so the debate continues: Does he do it on purpose for that common-man touch, or can't he help it? Did his advisers spend long hours drilling him, Henry Higgins-style, to no avail?
Update: Bush's subsequent reference to "clean, safe nucular energy" shows that the mispronunciation is not limited to the context of weapons. Does he also say "nucular family"?