Iowa Code § 49.105: Ordering arrest.

Any precinct election official shall order the arrest of any person who behaves in a noisy, riotous, tumultuous or disorderly manner at or about the polls, so as to disturb the election, or insults or abuses the officials, or commits a breach of the peace, or violates any of the provisions of this chapter. If the person so arrested is a registered voter of the precinct which that polling place serves, and has not yet voted, the person shall be permitted to do so before being removed from the polling place.