in the united states and around the world. i m wolf blitzer. you re in the situation room. this is cnn breaking news. breaking tonight russia is vowing a harsh response to new u.s. sanctions against members of vladimir putin s inner circle. punishment for interference in the election. the white house insisting the sanctions won t affect mr. trump s hope for a u.s. meeting. and stock prices plummet as the president hits china with additional tariffs and the trade secretary admits this could lead to a trade war. i ll speak with our correspondents and analysts who are all standing by. let s go to our senior white house correspondent pamela