Meet the media trainer who transformed Geithner from zero to hero

Just weeks ago, Treasury Secretary Timothy Geithner’s head was on the chopping block, in part because he seemed so awkward in front of cameras. Then he nailed back-to-back Sunday morning shows and the Katie-Brian-Charlie network news trifecta. How’d he do it? Democratic insiders attribute Geithner’s PR turnaround to the “Sheehan effect,” also known as Michael Sheehan, the media-training guru who has served as the speech coach at every Democratic convention since 1988. Past c…