A Labour MP I know tells a story about the young Tony Blair, campaigning in a tough council housing estate years before he was famous and powerful. At the time, Labour was still promoting a platform of more cordial relations with the Soviet Union, and nuclear disarmament. According to this (supposedly true) story, the young Mr Blair began explaining to an elderly woman that only Labour could avert nuclear armageddon. "Can Labour stop the yobs peeing in the lift?" she replied. Mr Blair waffled, sticking to his lines about disarmament. "Young man," said the voter severely. "If Labour can't stop them peeing in the lifts, how are they going to stop a nuclear war?"
Perhaps perversely, I tend to think that the latter is, somehow, easier to prevent than the former.