Long at odds with Trump, Defense Secretary Esper has prepared a resignation letter

[Tony]

WASHINGTON — Defense Secretary Mark Esper has prepared a letter of resignation, according to three current defense officials.

It's not uncommon for Cabinet secretaries to prepare undated letters of resignation during a presidential transition, giving the commander in chief the chance to replace them for a second term. The president decides whether to accept the resignation letters, and the process usually occurs after the election results are clear.