Quisling regime and Quisling government are common names used to refer to the fascist collaboration government led by Vidkun Quisling in German-occupied Norway during the Second World War. The official name of the regime from 1 February 1942 until its dissolution in May 1945 was Den nasjonale regjering (the National Government). Actual executive power was retained by the Reichskommissariat Norwegen, headed by Josef Terboven. Vidkun Quisling, Fører of the Nasjonal Samling party, first tried to carry out a coup against the Norwegian government on 9 April 1940, the day of the German invasion of Norway. At 7:32 p.m., Quisling visited the studios of the Norwegian Broadcasting Corporation and made a radio broadcast proclaiming himself Prime Minister and ordering all resistance to halt at once. He announced that he and Nasjonal Samling were taking power due to Nygaardsvold's Cabinet having "raised armed resistance and promptly fled". He further declared that in the present situation it was "the duty and the right of the movement of Nasjonal Samling to take over governmental power". Quisling claimed that the Nygaardsvold Cabinet had given up power, even though that it had only moved to Elverum, some 140 kilometers (85 miles) from Oslo, and was carrying out negotiations with the Germans. The next day, German ambassador Curt Bräuer traveled to Elverum and demanded King Haakon VII return to Oslo and formally appoint Quisling as prime minister. Haakon stalled for time, telling the ambassador that Norwegian kings could not make political decisions on their own authority. At a Cabinet meeting later that night, Haakon said that he could not in good conscience appoint Quisling as prime minister because he knew neither the people nor the Storting had confidence in him. Haakon further stated that he would abdicate rather than appoint a government headed by Quisling. By this time, news of Quisling's attempted coup had reached Elverum. Negotiations promptly collapsed, and the government unanimously advised Haakon not to appoint Quisling as prime minister.