Former Delaware Republican Senate candidate Christine O'Donnell has joined Sarah Palin as a speaker at a tea party rally this weekend in Iowa, one of the event's organizers told CNN. A representative of O'Donnell, who is travelling the country to promote her book "Troublemaker," approached the rally's representatives Monday to ask if there was room for her to speak, Charlie Gruschow, national co-chairman of the Iowa-based Tea Party of America, said. And there was. No other national leaders will be addressing the rally, Gruschow said. Palin is slated as the event's closing speaker on Saturday afternoon. Palin's address is drawing...
