California Gov. Davis was recalled. And here is an article posted on the FR about recalling McCain. So if the people can do it, I dont see why the state legislatures couldnt.
http://www.freerepublic.com/forum/a3b25a06e60b6.htm
Gray Davis was the Governor of a state. California law allows for the recall of state officials. It has not yet become part of the US Constitution.