The U. S. must go after more high-level officials and more businessmen close to Putin, such as Gazprom head Alexei Miller, LUKoil head Vagit Alekperov, Federal Security Service head Alexander Bortnikov and Defense Minister Sergei Shoigu. Sanctions against Russian banks and state-owned enterprises, especially any doing business in Crimea, should be adopted, and broader economic sanctions should be considered. As part of an informal Friends of Ukraine Task Force, I joined a number of colleagues in recommending to officials at the State Department and White House the following companies to be targeted: Gazprombank, Vneshekonombank, VTB, Sberbank, Rosoboronexport, Transneft, Novatek, Gazprom and Rosneft. By imposing further sanctions now, the West would aim to preempt, rather than react to, the possibility that Putin will invade other parts of Ukraine or Moldova.