O'Donnell's win stands as the latest sign of Tea Party strength but also the latest test of whether that movement helps or hinders the Republican Party, with an open seat and perhaps a GOP Senate majority at stake.
Party fractures on full display, Republican aides told Fox News Tuesday that O'Donnell would not be getting national fundraising support. State party leaders had warned that O'Donnell cannot compete against Democrat Chris Coons and vigorously backed Castle, a nine-term congressman and former governor.
The tragic part is that the Tea Party represents a left-of-center ideology. The GOP, of course, represents the FARRR Left.