Expertise in any field

But I also suspect that Trump is afraid to try anything substantive. To do public investment successfully, you need leadership and advice from experts. And this administration doesn’t do expertise, in any field. Not only do experts have a nasty habit of telling you things you don’t want to hear, their loyalty is suspect: You never know when their professional ethics might kick in.
Trump Doesn’t Give a Dam, by Paul Krugman, New York Times, 12 February 2018