An unusually high rate of staff turnover has characterized the first year of the Trump presidency, reports The New York Times' Peter Baker.

Why it matters: Axios' Mike Allen predicted this turmoil last October, calling the stampede to exit the White House in 2018 "the biggest threat to the Trump presidency, the markets and our ability to deal with future crises."

A microcosm: On Friday — all in one day — Trump's chief of staff John Kelly was reportedly willing to resign over his handling of staff secretary Rob Porter's departure earlier in the week, associate attorney general Rachel Brand stepped down, and one of the president's speechwriters left his job amid domestic abuse allegations.

The numbers, via Baker: