Hungary's ruling Fidesz party has signed a declaration on the future of Europe drawn up by Poland's Law and Justice (PiS) party chief Jaroslaw Kaczynski, Prime Minister Viktor Orban, Fidesz's leader, said on Friday. In a video posted on Fidesz's Facebook page, Orban said Kaczynski had called on parties with similar positions to PiS to sign the declaration issued after months of planning as a contribution to the ongoing debate on the future of the European Union. The declaration concerns the protection of nations, families and traditional Christian values, Orban said.