From May 5-11, 2012, I conducted a survey of 6,000 likely voters. On such a mammoth sample, the margin of error is less than 1 percent. I found that Romney has amassed a sizable lead over Obama of 51-42, far in excess of what published polling and surveys of registered — as opposed to likely — voters are indicating. If Romney were to win 51 percent of the vote, the election would, of course, be very close. But if he could hold Obama to 42 percent, it would be a landslide. So the obvious question is how Romney should go...