Democratic Rep. Paul Hodes, who has announced he is running for the seat being vacated by Republican Sen. Judd Gregg, holds small leads when matched against two potential GOP opponents, but both are well within the margin of error, according to a poll by Dartmouth University's Nelson Rockfeller Center conducted April 27 - May 1.

Hodes leads former Sen. John Sununu, who lost his seat to Jeanne Shaheen last year, by 37.9 percent to 35.4 percent with 26.7 percent undecided. Hodes holds an even smaller lead over former Rep. Charlie Bass - 31.1. percent to 30.1 percent with 38.8 percent undecided. Hodes beat Bass for New Hampshire's 2d district seat in 2006. The margin of error is 5 points.

The poll also measured voter sentiment on the issue of same sex marriage, finding them 44.8 percent to 40.8 percent against it. The New Hampshire Senate voted to legalize same-sex marriage by a narrow 13 to 11 vote last month.