Ukraine President Volodymyr Zelensky said on Tuesday that Ukrainian forces were maintaining their positions on the front line in eastern Ukraine despite considerable pressure from constant Russian attacks.”It is very important that despite great pressure on our forces, the front line has undergone no change,” Zelensky said in his nightly video address.Zelensky said Russian forces were suffering “staggering losses” in constant attacks in Donetsk and Luhansk regions, the main focus of the fighting.