President Trump insists his isn't a White House in chaos, but it's hard to deny the near constant churn of key aides, including Tuesday's announced departure of economic adviser Gary Cohn. A full 43 percent of top-level positions in the Trump White House have seen turnover. That is not normal.

"After two full years, President Obama was at 24 percent and President Bush was at 33 percent," said Kathryn Dunn Tenpas of the Brookings Institution and the White House Transition Project, whose research specialty includes staff turnover. "So, [Trump] already passed them with his first-year turnover. It continues to surge."