It will not.Representative Edward J. Markey, the Malden Democrat, said his constituents are showing concern, but not panic.???We???re certainly not at DEFCON 1,?????? he said, referring to the military readiness code for an imminent war. ???We???re down at DEFCON 4 or 5.??????State and city officials fear an extended shutdown will not only threaten such services as job training, homeless shelters,