Radical Change (Spanish: Cambio Radical) is a political party in Colombia. At the last legislative elections in Colombia on March 12, 2006, the party became one of the most important in the new congress, receiving 15 seats in the lower house and 20 in the upper house. Along with the Social Party of National Unity, or "Party of the U" (the biggest party in the lower house and the second biggest in the upper house) and the Conservative Party, it was president Álvaro Uribe's main ally in congress and formed part of his absolute majority.