Martin Sheen confirmed at the TCA winter press tour this morning that he is near a deal to return to The West Wing for the first half of next season — through the end of President Bartlet's second term. Potential Bartlet successors Jimmy Smits and Alan Alda are also slated to return for the seventh season, although exec producer John Wells has yet to decide which will become the next president. Meanwhile, Home Improvement's Patricia Richardson is joining the cast as Alda's campaign manager.