Amid the furious negative ads Bill Clinton and Paul Tsongas have been firing at each other, it is easy to forget that a presidential campaign is supposed to be a contest over ideas. In TV spots, Tsongas has accused his rival of pandering and dishonesty, while Clinton has painted Tsongas as a hard-hearted crypto-Republican. Lost in the din is the fact that these two leading contenders for the Democratic nomination are charting a new direction for their party, moving it away from interest-group economics toward a new vision of American competitiveness.
The seriousness of that quest was underscored last week as...