Hungary’s recent decision to ease visa restrictions for Russian tourists is an open door for spies, and EU leaders should take urgent countermeasures, according to Manfred Weber, chairman of the European Parliament’s largest party, the European People’s Party. According to him, the issuance of European visas would allow Russians who have not been vetted to travel freely throughout most of the EU and raises serious national security concerns. Weber has sent a letter to European Council President Charles Michel asking him to raise the issue at the next leaders’ summit in October. This month, Hun…