In the 3550s the Mandarran Union entered an economic deppresion and the ideas of socialism once again took hold. The Socialist Unity Party formed via the joining of many left wing groups and it soon dominated the bicameral Federal legislature known as the Senate. The Senate is made up of 2 Houses. The House of Ministers, and the Peoples Congress. In the 3570s the Nationalist Party was banned due to terroristic activities. The Peoples Republican Party was also disbanded shortly after, returning Mandarr to Single-party rule.