The firing of Erika McEntarfer, head of the Bureau of Labor Statistics, destroys the credibility of essential information

I spent much of the 1990s as the secretary of labor. One unit of the labor department is the Bureau of Labor Statistics.

I was instructed by my predecessors as well as by the White House, and by every labor economist and statistician I came in contact with, that one of my cardinal responsibilities was to guard the independence of the Bureau of Labor Statistics.

Otherwise, this crown jewel of knowledge about jobs and the economy would be compromised. If politicized, it would no longer be trusted as a source of information.

So what does Donald Trump do? In one fell swoop on Friday, he essentially destroyed the credibility of the BLS.