Trump has a credibility problem with Iran. Shanahan's departure makes it worse.
President Trump has a credibility problem at a time when his confrontation with Iran is moving toward a dangerous test.
"There is no capital in the bank" in terms of trust with major European and Asian allies, said one former senior defense official. "We've managed to isolate ourselves, rather than Iran. This is a strategy-free zone."
Adding to the sense of vertigo surrounding U.S. defense policy was the withdrawal Tuesday of Patrick Shanahan as Trump's selection for defense secreta...