Ms. Vallow Daybell was convicted in Idaho in May in the murders of two of her children and of conspiring to murder her husband’s previous wife. She faces charges in other cases.
During a crucial period in American law — when abortion, affirmative action, sex discrimination and voting rights were on the docket — she was the most powerful woman in the country.
Two Republican lawmakers had argued that they could not be questioned about their motives for supporting the laws, which require proof of citizenship to vote in federal elections.