Nuclear security

Trump can launch nuclear weapons whenever he wants, with or without Mattis

The abrupt and pointed resignation of Secretary of Defense Jim Mattis on Thursday alarmed official Washington. Sen. Mark R. Warner (D-Va.) called him an “an island of stability amid the chaos of the Trump administration.” Retiring Sen. Jeff Flake (R-Ariz.) told The Washington Post that “having Mattis there gave all of us a great deal more comfort than we have now.”

Mattis’s departure seems to be provoking unease, especially considering how dangerous our nuclear-command arrangements are. The notion that Mattis, a former four-star Marine Corps general, could have blocked or defied a move by Trump to impulsively launch nuclear weapons may have seemed comforting, but it shouldn’t have been. The secretary of defense has no legal position in the nuclear chain of command, and any attempts by a secretary of defense to prevent the president from exercising the authority to use nuclear weapons would be undemocratic and illegal. With or without Mattis, the president has unchecked and complete authority to launch nuclear weapons based on his sole discretion.