White House reacts to Patrick Shanahan withdrawing as Defense Secretary nominee  CBS NewsShanahan's departure leaves Pentagon adrift, with a growing power vacuum and Pompeo as de facto defense secretary  Washington ExaminerShanahan withdraws from consideration to be US defence secretary  Al Jazeera English'Start Here': Trump kicks off 2020 campaign as his defense pick steps down  ABC NewsShanahan withdraws from consideration to be defense secretary  Daily MailView full coverage on Google News