Two human rights groups are opposing the pending State Department nomination of a Goldman Sachs executive over his ties to a company linked to atrocities in Sudan. Last week, President Obama said he would nominate Robert Hormats, a vice chairman of Goldman Sachs International, to a top economic position at the State Department. The Genocide Intervention Network and Investors Against Genocide say Hormats played a key role in backing a public offering by PetroChina, whose parent company holds a majority stake in the Sudanese government’s oil production. The groups say those ties have helped support human rights abuses committed by Sudan.