N.H. Rev. Stat. Ann. § 659:41

Any person who shall assault a town, city, or ward officer as provided in RSA 631 in the discharge of any duty of his office at any election shall be guilty of a class A felony or a class B felony, but never less than a class B felony, other provisions of the law to the contrary notwithstanding. Any person who shall take away, tamper with, injure, attempt to injure, destroy, or attempt to destroy the ballot box or checklist when in use at any election shall be guilty of a class B felony.