WASHINGTON – The view among the national security officials was unanimous: Military aid to Ukraine should not be stopped. But President Donald Trump’s acting chief of staff thought otherwise. As the aid was being blocked this summer, Ukraine officials began quietly asking the State Department about the hold-up. The concern was clear for the young democracy battling an aggressive Russia. “If this were public in Ukraine it would be seen as a reversal of our policy,” said Catherine Croft, the special adviser for Ukraine at State, who fielded the inquiries from the Ukrainians. “This would be a really big deal,” she testified.