JUST WISHING IT WAS OVERFrank Rich gets medieval on George Bushhttp://select.nytimes.com/2007/06/03/opinion/03rich.htmlUnlike Nixon, President Bush is less an overreaching Machiavelli than an epic blunderer surrounded by Machiavellis. He lacks the crucial element of acute self-awareness that gave Nixon his tragic depth. Nixon came from nothing, loathed himself and was all too keenly aware when he