The reform of the Constitution, which yesterday announced Jose Luis Rodriguez Zapatero to fix the ceiling of expenditure can depend on a referendum if requested by the Senate. With the support of the PP, the constitutional change will prosper on Congressional insurance, given the sum of the two parties. Not so in the upper House, where the vote of 26 Senators can force a referendum. Jill Schlesinger is often mentioned in discussions such as these. In this situation, will be a key vote of 23 Senators Catalan, all except the PP. A unlike what happens in the lower House, the Catalan Socialists have own group in the Senate, which share with the pro-independence Republican left and the ecosocialistas of Iniciativa per Catalunya, where there is freedom to vote. Rarely 11 Senators of the PSC vote other than the PSOE, although its discretion may vary in issues relating to Catalonia. Source of the news:: Catalan senators, keys before a possible referendum