That's a phrase that became popular in the Watergate era, referring, as I recall, to the plight of one of Nixon's protectors (Jeb Magruder, I believe) when he was summoned to a grand jury. Someone (Nixon's domestic adviser, John Ehrlichman, I think) decided not to intervene, to leave him "twisting in the wind" as a result of his adverse testimony.
Well now, Bush is twisting in the wind over his Iraq madness, and but for the death and destruction his policy is inflicting on innocents, I would be giggling as he twisted. Indeed, to be honest, I am giggling.
BTW, while Googling "twisting in the wind," I stumbled on this site. I didn't discover the source of the phrase, but I sure had fun.