North Carolina Sen. Richard Burr, considered one of the most vulnerable Republican senators, leads national Democrats' favored candidate Cal Cunningham by 16 points, according to a new Rasmussen poll (Jan. 27, 500 LV, MoE +/- 4.5%). Against Secretary of State Elaine Marshall, however, Burr's support drops below 50% and margin to 10 points.

Burr 50
Cunningham 34
Und 11

Burr 47
Marshall 37
Und 10

One thing holding Cunningham, a former state senator, back is that more than a third of voters don't know enough about him to hold an opinion of him. Meanwhile, 56% of voters hold a favorable impression of Burr and 41% view Marshall favorably.

In the state, President Obama has a 48% job approval rating with 52% disapproving.
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