Of all the indignities involved in losing a presidential race, none is more stark than the sudden emptiness of your entourage. The Secret Service detail guarding Governor Romney since Feb 1. stood down quickly. He had ridden in a 15-car motorcade to the Intercontinental Hotel in Boston for his concession speech. He rode in a single-car motorcade back across the Charles River to Belmont. His son, Tagg, did the driving.