ANKARA (Reuters) – A chief adviser to Turkey’s president told his U.S. counterpart that Turkey wanted “concrete steps” on the existence of what it calls “terrorist organisations” in Finland and Sweden before it would consider their NATO bids, the Turkish presidency said. U.S. national security adviser Jake Sullivan and Ibrahim Kalin, chief foreign policy adviser to President Tayyip Erdogan, spoke on Monday to discuss the NATO bids and the war in Ukraine, the Turkish presidency said in a statement. Turkey has objected to the two countries joining the Western defence alliance on the grounds that…