In a good sign for Democratic efforts to expand their Senate majority this year, a new Rasmussen poll of the New Hampshire Senate race finds former Democratic Gov. Jeanne Shaheen ahead of GOP Sen. John Sununu, who narrowly defeated her back in 2002.

The numbers, compared to the last poll from a month ago:

Shaheen 51% (+2)
Sununu 43% (+2)

Sample size: 500 likely voters
Margin of error: ±4%

Shaheen has consistently led in polls since even before she announced her candidacy, making Sununu the single most vulnerable incumbent Senator from either party this year.