Much has been written, often with considerable glee, about the worsening divide in the Republican Party between its corporate and Tea Party wings. Yet Democrats may soon face their own schism as a result of the growing power in the party of high-tech business interests. Gaining the support of tech moguls is a huge win for the Democrats — at least initially. They are not only a huge source of money, they also can provide critical expertise that the Republicans have been far slower to employ. There have always been affluent individuals who backed liberal or Democratic causes, either out...