The Unraveling of Mick Mulvaney

The White House chief of staff, still “acting” after all these months, should never have been cast in the role of spin doctor.

There he goes again.

This weekend, Mick Mulvaney, the acting White House chief of staff, sat down with Chris Wallace on “Fox News Sunday” to try to bind some of the gaping wounds he’d inflicted on President Trump’s impeachment defense in recent days. Instead, Mr. Mulvaney again flubbed his lines, making himself look even more inept and dishonest. Yet this alone does not fully address why the...