Republican Proposal (Spanish: Propuesta Republicana, PRO) is a center-right political party in Argentina. It is usually referred to as PRO. PRO was formed as an electoral alliance in 2005, but was transformed into a unitary party on 3 June 2010.PRO began as an alliance between Commitment to Change, the party of Mauricio Macri based in Buenos Aires, and Recreate for Growth (Recrear) of Ricardo López Murphy.