In Bolton vs. Trump, a clash of brawlers

In the spring of 2018, then-Trump administration national security adviser John Bolton and one of his top lieutenants, Fiona Hill, were locked in a lengthy closed-door negotiation with a persnickety European ally.

Hill knew Bolton's legend as a hard-nosed, blunt, impatient bulldozer of a man, so what she saw came as a bit of a shock: He was being patient and charming...