Cal. Elec. Code § 18502

Any person who in any manner interferes with the officers holding an election or conducting a canvass, or with the voters lawfully exercising their rights of voting at an election, as to prevent the election or canvass from being fairly held and lawfully conducted, is punishable by imprisonment pursuant to subdivision (h) of Section 1170 of the Penal Code for 16 months or two or three years.