Republican bravado about running away with this suburban St. Louis open seat has given way to genuine concern about young GOP lumber businessman Jason Plummer's ability to weather attacks on Medicare and his "rich kid" status. Retired Illinois National Guard Gen. Bill Enyart has gravitas all over Plummer, but private polls still point to a dead heat. This energy producing area isn't a part of the state where President Obama will be helpful to Democrats' chances. A bellwether.

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