Several California wineries are following in the footsteps of Presidents Clinton and Nixon. Not to worry--there's no Winegate in the offing. Rather, they've decided to do business with China. Among those selling wine to that country of some 1.2 billion are Fetzer and Wente. Jeff Techel, Wente's Asian export manager, says: "The Chinese make white wine but prefer red. A bottle of Cabernet is considered a night on the town."