WASHINGTON -- As Election Day arrives, Democrats are in a strong position to maintain their majority in the Senate. But for much of 2012, Democratic control of the chamber looked unlikely.
Republicans need to win a net gain of four seats to achieve a majority, which once seemed achievable. First, there were retirements of Democratic incumbents in conservative and competitive states, including Nebraska, North Dakota, Virginia, Wisconsin, and New Mexico.
Additionally, Democratic incumbents looked vulnerable in Missouri, Montana, Ohio, and Florida for most of the year. Meanwhile, it seemed that the only seat that Republicans would have to actively defend was Massachusetts.
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