Why he should have recused himself and why @HouseForeign is justified in seeking further information on this case:
justsecurity.org/71983/a-confli…
State Dept's acting legal adviser Marik String's reported actions raise “multiple red flags."
“I would certainly expect someone who participated in a decision under review to recuse him or herself from the review process, since both the appearance and reality of impartiality are essential...”