It’s likely that no candidate will win so much as 30 percent of the votes cast in Tuesday’s Iowa caucuses. Yet you can bet that the press corps will crown as the big winner the candidate who gets perhaps one-quarter of the votes of caucus-goers in a state that’s half the size of the average state. Meanwhile, those who get one-sixth, or one-seventh, or one-eighth, of that same vote, will be labeled as losers who might want to think about dropping out of the national race. This, of course, is foolishness.