David Corn doesn't like the idea of a special prosecutor:
These liberals all want to see alleged Bush administration wrongdoing exposed. But there's one problem with a special prosecutor: it's not his job to expose wrongdoing. A special prosecutor does dig up facts--but only in order to prosecute a possible crime. His mission is not to shine light on misdeeds, unless it is part of a prosecution. In many cases, a prosecutor's investigation does not produce any prosecutions. Sometimes, it leads only to a limited prosecution...A special prosecutor, it turns out, is a rather imperfect vehicle for revealing the full truth.