John Kennedy actually said...
In my opinion these unresolved labor disputes have resulted in a strike affecting a substantial part of the tactical fighter production industry, which is part of the aircraft industry of the United States, and which is engaged in trade, commerce, and transportation among the several states; which strike, if permitted to continue, will imperil the national safety.
Context
Letter to the Attorney General Directing Him To Petition for an Injunction in the Republic Aviation Corporation Strike.
06/14/1962