Boeing's European rival, Airbus, also stands to lose deals if the U.S. imposes sanctions against Iran.
Elon Musk on NASA: "As soon as you don’t have any competition, the sense of urgency goes away."
The circumstances surrounding the incident are currently under investigation.
While not offering details, Muilenburg said the "excellent conversation" with Trump could lead to a deal "in the very near term."
The Boeing Black phone is aimed at government agencies and others that need to keep communications and data secure.
Companies paid by American taxpayers charge as much as $763,029 per worker.