Stephen Gutowski, here's the star of the summer of 2005 completing her descent into any-conspiracy-will-do-ism and declaring herself a "9/11 Truther."
There really was a political/cultural moment when Sheehan, whose son died in Iraq, was an un-touchable, credible activist. Conservatives who attacked her at the time, like Glenn Beck and Mike Gallagher, were criticized for being so gauche. But Sheehan was adopted into other left-wing causes and the broader left really dumped when she ran a quixotic third party campaign against Nancy Pelosi in 2008. I am not, not, not making a one-to-one comparison here, but there is a lesson for tea party activists who are currently and unquestioningly the toast of the conservative elite and the GOP.