I think a lot of pundits like Mr. Krugman are having a hard time wrapping their mind around the fact that for the first time in many decades (centuries?) the United States has a elected a non politician as President.  (Eisenhower technically had never held an elected office, but had been immersed in government and politics, both domestic and foreign, for years before serving as President.)  I expect Trump will continue to do and say many unconventional things in the days to come that will continue to cause the NYT editorial staff to froth at the mouth.