Since then, however, Sheehan has become a growing thorn in the Democrats’ side, as her extremist views and bizarre behavior are increasingly targeted at democrats who, in Sheehan’s opinion, are not sufficiently “anti-war” for the “peace mom.”

First, Sheehan publicly attacked Hillary Clinton for her vote in support of the Iraq war. Since then, Clinton, crisscrossing the country in support of her 2008 presidential ambitions, has faced regular protests and even heckling from her own anti-war “base.”

Now, Sheehan is actually considering a primary run for the Senate against California Senator Diane Feinstein, “to protest what she called the California lawmaker's support for the war in Iraq.”

"She voted for the war. She continues to vote for the funding. She won't call for an immediate withdrawal of the troops…I think our senator needs to be held accountable for her support of George Bush and his war policies.”

During, and after, her protests against the President, Sheehan’s behavior and words became more extreme. And, as long as she was directed such bizarre statements as “my son died to spread the cancer of Pax Americana,” "This country is not worth dying for,” and “the biggest terrorist is [the President]" against George W. Bush, she was treated respectfully, as a “grieving mother” who was above criticism, by democrats and their allies in the media.

That respect is creating the impression, in the minds of both Sheehan and her supporters, that she is a figure of stature and a serious voice in the national debate on the war in Iraq.

Now, however that stature is being used against the very people who created it.

As such, it will be interesting to see whether her mainstream supporters can escape this “peace monster” of their own creation.