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It was a clear 22 degrees at Gobbler's Knob this morning when Punxsutawney Phil, the weather forecasting groundhog, emerged from his cage and blinked with no signs of seeing his shadow, predicting an early spring.

Monday on the NewsHour, it’s caucus night in Iowa. We preview the nation’s first voting contest with a look at Evangelicals' role in shaking out a crowded GOP field, Amy Walter and Tamara Keith update what's happening on the ground,…