ISTANBUL  Poland will remain exempt from the EU’s mandatory migrant relocation system for as long as it continues hosting large numbers of Ukrainian refugees, Foreign Minister Radoslaw Sikorski said Friday. Speaking to private broadcaster Polsat News, Sikorski said the exemption was not permanent but would last “a good couple of years,” TVP World reported. He noted that the presence of millions of Ukrainians in Poland constituted “huge migratory pressure,” also recognized by Brussels. “While we