議院内閣制
The actions taken against the military contributed to a strong showing by the UCR in the November 1985 legislative elections. They gained one seat in the Chamber of Deputies, the lower house of Congress, which meant control of 130 of the 254 seats. The Justicialists lost eight seats (leaving 103) and smaller, provincial parties made up the difference. Alfonsín surprised observers in April 1986 by announcing the creation of a panel entrusted to plan a transfer of the nation's capital to Viedma, a small coastal city 800 km (500 mi) south of Buenos Aires. His proposals boldly called for constitutional amendments creating a Parliamentary system, including a Prime Minister, and were well received by the Chamber of Deputies, though they encountered strong opposition in the Senate.