In 1933, Quisling left the Farmers' Party and founded the fascist party "Nasjonal Samling" (National Union). Although he gained some popularity after his attacks on the political left, his party failed to win any seats in the Storting and by 1940 it was still little more than peripheral. On 9 April 1940, with the German invasion of Norway in progress, he attempted to seize power in the world's first radio-broadcast "coup d'état," but failed after the Germans refused to support his government. From 1942 to 1945 he served as Prime Minister of Norway, heading the Norwegian state administration jointly with the German civilian administrator Josef Terboven. His pro-Nazi puppet government, known as the Quisling regime, was dominated by ministers from Nasjonal Samling. The collaborationist government participated in Germany's Final Solution, a genocidal program targeting Jews.