He and his wife adopted 2 children from a country that required residency in that country which the Roberts did not do thus making adoption likely illegal. No doubt Holder would threaten to deport them afterall the children are not violent cartel members.
Would the children having to be cared for in Ireland be worse than selling out the future of the US? Assuming this is the blackmail issue, Roberts has not thought it through.
bingo.... you know the back story