Election year has finally arrived, well after the beginning of a turbulent and unpredictable elections season, and voting begins on Tuesday in the Iowa Republicans caucuses. The few days of post-Christmas polling have shown the numbers oscillating and opinion changing in ways it hadn't been earlier in the campaign. Pre-Christmas, Barack Obama's job rating was on a bit of an uptick, nudging up toward but not quite reaching 50 percent approval in several polls. But two polls taken in the three days after Christmas by Gallup and Rasmussen show him with solidly negative job ratings, and Rasmussen shows him trailing...