President Trump’s planned acceptance of a $400 million jet from the Qatari government raises a series of ethical and national security concerns, as the commander in chief turns to the polarizing but immensely wealthy Gulf state to leapfrog existing plans for constructing a new Air Force One.The government has already contracted with Boeing to deliver a replacement for the aging presidential plane — a project not expected to be completed until as early as 2027.But the Qatari gift woul