(CNN) Vermont Sen. Bernie Sanders holds on to his lead on the eve of New Hampshire's Democratic primary, the final CNN tracking poll conducted by the University of New Hampshire Survey Center shows.

Only about half of likely primary voters in New Hampshire say they have definitely decided for whom they will vote, meaning that despite the stability in the numbers throughout the six-day tracking period, there remains room for preferences to shift.

Sanders has a gaping 24-point lead among those who say they are committed to their candidate (42% for Sanders, 18% for Buttigieg, 14% for Biden, 10% for Warren, 6% for Klobuchar). Buttigieg holds an 11-point lead among those who could change their minds (26% for Buttigieg, 15% for Sanders, 10% for Warren and 7% each for Biden and Klobuchar).

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