"State law requires him to provide public voter information to anyone who requests it."

Williams keeps saying this but I cannot find any "state law" that requires it. In fact, state law implies strongly the contrary.

The relevant statute is CRS 1-2-302 "Maintenance of computerized statewide voter registration list - confidentiality."  Point One: CONFIDENTIALITY.

This statutory provision goes into extensive length detailing the narrow window in which this information can be shared with other Colorado state agencies such as Corrections. 

This statutory provision expressly prohibits some voter information from being shared at all. It never authorizes the sharing of the remainder.

Apparently, Williams chooses to interpret "confidentiality" of these lengthy statute in the loosest possible manner.

But when Williams portrays his hands as "tied" - that's an overstatement. Interpreted narrowly, the Legislature itemizes who he may share with and they don't list any federal commission.