WASHINGTON (AP) — Acting Defense Secretary Patrick Shanahan stepped down Tuesday before his formal nomination ever went to the Senate, citing a "painful" family situation that would hurt his children and reopen "wounds we have worked years to heal."

President Donald Trump announced Shanahan's departure in a tweet, and said Army Secretary Mark Esper would be the new acting Pentagon chief.

"I believe my continuing in the confirmation process would force my three children to relive a traumatic chapter in our family's life and reopen wounds we have worked years to heal," Shanahan said in a stateme...