S ince the end of the Cold War, the main challenge to those who favor a "constructive engagement" with China has come from human rights advocates and labor leaders. But in the last year, a new opposition voice has been heard, arguing for a return to the containment strategy used against the Soviet Union. This new strategy has very little support at the Brookings Institution or the Council on Foreign Relations, but it is well represented in the Weekly Standard , Commentary , and the New Republic , and in the columns of George Will , William Safire , and A.M. Rosenthal . Some of the loudest voices are former Cold War conservatives who were exiled from inner policy circles in the last revisionist years of the Reagan administration. These include Michael Ledeen (who helped broker the first arms-for-hostages deal with Iran), Frank Gaffney (who was deputy to Defense Department official Richard Perle), and Robert Kagan (former aide to State Department official Elliot Abrams). These advocates...