A constitutional crisis is developing between Congress and the Department of Transportation over the federal government's decision to continue its project allowing Mexican trucks on U.S. roads, in defiance of new legislation. "The DOT response is both arrogant and wrong!" Sen. Byron Dorgan, D-N.D., wrote in a letter yesterday to Secretary of Transportation Mary Peters. Federal Motor Carrier Safety Administration officials told the San Diego Union Tribune the cross-border Mexican truck demonstration project would continue because the program was established in September and the amendment allows programs that have already begun to continue. But Dorgan insisted a provision in the...