Congressman Chris Pappas maintains a commanding lead in the New Hampshire Democratic Senate primary due to his established name recognition, moderate voting record in the House, and strong fundraising as the clear establishment favorite to succeed retiring Senator Jeanne Shaheen. Recent polling through late June shows his support holding a majority among likely Democratic primary voters, though the margin has narrowed somewhat since April with younger and progressive voters backing challenger Karishma Manzur. Manzur, a scientist and activist emphasizing progressive priorities on healthcare and foreign policy, has drawn limited broader traction ahead of the September 8 primary. Trader consensus reflects these structural advantages for Pappas, while late developments such as unexpected polling shifts, turnout surges among specific voting blocs, or major campaign endorsements could still alter the outcome before ballots are cast.