President Trump’s confirmation that the United States may accept a presidential aircraft gifted from Qatar marked the latest escalation in his clash with Boeing.

The president might want to dump Air Force One for a luxury jet gifted by Qatar’s royal family.Boeing investors should take note.Today, two Boeing 747s—used interchangeably—become Air Force One when the president is onboard.

U.S. officials say it could be converted into a potential presidential aircraft to replace the 40 year old Air Force One. The Qatari government said a final decision hadn’t been made.