A deadline for Hungary to explain its easing of entry requirements for Russian and Belarusian nationals is set to expire on Monday, as frustration with Viktor Orbán’s rogue foreign policy mounts in EU capitals. In a letter addressed to her Hungarian counterpart earlier this month, the EU’s home affairs chief Ylva Johansson asked the government in Budapest to explain recent changes made to the National Card immigration scheme, making it easier for Russians and Belarusians to enter the country to work. The scheme grants a stay of two years renewable by an additional three to “guest workers”, but…