Roll Call names Shaheen one of nation's 7th most vulnerable senators

7. Jeanne Shaheen, D-N.H.
Shaheen is well-liked and remains the clear favorite, but a single poll in mid-August showing a 2-point race caused an uproar of speculation. Itís likely not that close, but Republicans hope former Massachusetts Sen. Scott Brown will begin to close the gap after the Sept. 9 primary.
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