France's largest fine-wine region produces wines that Americans have enjoyed since the days of Thomas Jefferson, and the United States has remained one of Bordeaux's most important export markets. Today, Bordeaux's star has dimmed here. On one hand, Americans are adventurous, and we have left Bordeaux behind to explore new wines from around the world. On the other hand, Bordeaux has left us behind, pricing its top wines far beyond the reach of most American consumers. Wine Spectator publisher Marvin R. Shanken and executive editor Thomas Matthews explain.