An anti-vaccine activist was cited on suspicion of assault by the Sacramento Police Department on Wednesday after he livestreamed a physical confrontation with state Sen. Richard Pan, author of legislation to restrict vaccine exemptions.

Pan, a Democrat from Sacramento, was pushed from behind by Kenneth Austin Bennett, who challenged the senator in the 2018 primary but did not qualify for the general election. Bennett filed a recall petition against Pan this year alleging the senator was committing treason by authoring bills to tighten vaccination requirements in the state.