German Justice Minister has penned a letter to Turkish Justice Minister Bekir Bozdag over Berlin’s decision to ban Turkish ministers from holding events in two German cities ahead of the April 16 constitutional referendum that will decide whether the current parliamentary system should be shifted to an executive presidency. Maas sent the sharply worded letter after bozdag canceled their scheduled meeting for March 9. “When journalists, judges and attorneys are arrested simply because they are doing their jobs, simply because they are fulfilling their role in a constitutional state, then each arrest marks a degradation of the rule of law,” he wrote.