Andrea Mitchell was not the only journalist to express shock at Trump's lack of knowledge concerning world affairs, here is how Eugene Robinson responded to that Washington Post interview:
Donald Trump’s ignorance of government policy, both foreign and domestic, is breathtaking. The Republican Party is likely to nominate for president a man who appears to know next to nothing about the issues that would confront him in the job.
Here is the transcript of the interview, just in case you think these journalists are exaggerating. But I warn you, some of your brain cells may not survive the experience.