[Need personal advice of a political nature? Or political advice of a personal nature? Send your question to Stumped. Questions may be edited.] Dear Stumped, Main question: Why does Barack Obama win every caucus against Hillary Clinton? Corollary question: Why does Clinton win almost every large-state primary? -- Dean A. Barclay Dear Dean, I myself have been stumped at the ease with which Obama has claimed most of the caucuses, to a point where the Clinton campaign fell into a pattern of dampening expectations by saying, "What do you expect, it's a caucus," as if they were the Miami Dolphins being asked to play in the snow in December. What's surprising is that no one anticipated the Clinton juggernaut to be outhustled in contests that place a premium on organization. If I'd told you a year ago that Clinton would be the underdog in caucuses because she was up against ...