sentences:  Ultimately only the PCF and the SFIO supported the draft Constitution, which envisaged a form of government based on unicameralism; but this was rejected in the referendum of May 5, 1946.For the 1946 elections, the Rally of the Republican Lefts ("Rassemblement des gauches républicaines"), which encompassed the Radical-Socialist Party, the UDSR and other conservative parties, unsuccessfully attempted to oppose the MRP-SFIO-PCF alliance.The new Constituent Assembly included 166 MRP deputies, 153 PCF deputies and 128 SFIO deputies, giving the Tripartite alliance an absolute majority.