For true believers the change could not have been more startling if Joseph Stalin had bought stock in General Motors. Ronald Reagan, who built his political career by trashing arms-control agreements and demanding a linkage between American cooperation and Soviet good behavior, appears more interested in treaties and a second summit meeting with Mikhail Gorbachev than in punishing the Soviets for their Daniloff perfidy.
The Reagan who in 1983 labeled the Soviet Union the "focus of evil in the modern world" has held his rhetorical tongue firmly in check since then. The President who slapped sanctions on the Soviet Union in...