The conservative movement that for a generation has been the source of the Republican Party's strength is in the dumps. THIRTY years ago Eric Hobsbawm, the dean of Marxist historians, chose as his subject, for the Marx memorial lecture, “The forward march of labour halted?” Things turned out even worse, for his side, than he had expected, thanks in part to the rise of a very American brand of conservatism. But are we now witnessing Mr Hobsbawm's revenge: the forward march of American conservatism halted? The right has dominated American politics since at least 1980. The Republicans' electoral successes have...