When Cyrille Adoula became the Prime Minister of Congo in August 1961, however, the United States took a firmer stance against Tshombe. According to diplomat George C. McGhee, Struelens knew that his office was tapped. Faced with the uneasy situation of the Katanga Information Services, the State Department used Struelens' incorrect visa as a pretext to expel him. A Congressional investigation, co-chaired by Dodd and James Eastland had to determine whether the State Department abused its power in this matter. Senator Kenneth Keating stated that "the actions of the State Department in reference to Struelens have been beneath our dignity as a great power and will not serve to impress either those who agree or disagree with the position of the State Department toward the Congo problem. Eventually, Struelens did not get deported before the end of the Katangese secession in January 1963.