One of the side stories to Sen. John McCain 's announcement that he would suspend his campaign , go to Washington D.C. to help with the bailout talks and push to postpone Friday's debate is that he would be canceling tonight's appearance on the Late Show with David Letterman .
So who takes his place? MSNBC's Keith Olbermann , according to TV Week .
Olbermann was last on the Late Show exactly five months ago (pictured).
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