In a dramatic departure from long-standing foreign policy toward Cuba, President Bush today is unveiling a new initiative that marks, for the first time since the Bay of Pigs, an active attempt to undermine Fidel Castro. Without lifting the travel ban or trade embargo, Bush is attempting to infiltrate Castro's island prison with humanitarian assistance and democratic values in an approach dubbed by a senior State Department official as a "frontal assault against Castro."The basic thrust is that the U.S. will attempt to make an end-run around Castro to both engage the Cuban people and sow the seeds of democracy.In...