As the shoutfest The Onion fittingly dubbed “The War for the White House” staggers towards its storm-soaked climax next Tuesday, there’s one fundamental question that I don’t think has really been answered yet: Why are scientists such raving liberals? We can’t deny that we look that way to the general public. Nature, which is to science what The Wall Street Journal is to investment banking, unabashedly endorsed President Obama for re-election.