Newsweek‘s Richard Wolffe on the “Obamacans” — Republicans who are ready to cross party lines to vote for Barack Obama. Unless, of course, those many millions of older, less-well-educated, Hillary-supporting women and skeptical-reluctant Hispanics don’t stop the train in its tracks over the next several weeks. Never underestimate the ability of the slow-to-come- arounders to poison the pond and drag things down to their level. Remember the “security moms” of ’04?