Why the Democratic Revolution may not happenCall it chronic suspicion of the conventional wisdom, or even petulant contrariness. Still, the rush to declare that the Democrats will rampage to control of Congress in two weeks seems a little shaky. There are too many uncertainties for anybody to accept uncritically predictions of 20-seat Democratic gains in the House and perhaps control of the Senate.The biggest? If the midterm is a referendum on the Iraq war—and that is what the polls say—voting Democratic is not exactly an anti-war vote. In particular, Democratic House candidates are not within striking distance of GOP candidates...