Spanish Prime Minister Louis Rodriguez Zapatero arrived the Polish capital Warsaw Friday to urge Poland's political leaders to "look forward" when considering their position on the European Union constitution, according to dpa. Zapatero made the remark in the German capital Berlin after talks with German Chancellor Angela Merkel and before travelling to the Poland for talks with Polish President Lech Kaczynski and Prime Minister Jaroslaw Kaczynski. "The message I will bring to Poland is that we must look forward and that we must make progress," Zapatero said in Berlin. The Spanish leader is the latest in a string of European dignitaries to visit Warsaw this week in hopes of securing Poland's agreement to the EU's draft constitution at an EU summit in Brussels June 21-22. French President Nicolas Sarkozy and Austrian Chancellor Alfred Gusenbauer were among the dignitaries who visited Warsaw this week in hope of securing Poland's agreement for the draft constitution. Poland has, however, stood firm on its demand that the voting system in the existing draft, which Poland claims favours larger countries, be changed in order to give equal clout to all states, both large and small. On Friday the Polish parliament passed a resolution backing the so-called "square root" voting system to replace the "double majority" voting model written into the existing constitutional draft. According to a survey by the independent TNS OBOP pollsters published Friday by Poland's Dziennik daily, the majority of respondents said Prime Minister Kaczynski was right to insist on the "square root" model.