(It is not clear if the entire transfer will be devoted to stripping the new Air Force One back to its airframe, but Air Force officials privately acknowledge dipping into nuclear modernization funds for the complex project.) Concerns over the many apparent conflicts of interests involved in the transaction, given Mr. Trump’s government dealings and business ties with the Qataris, have swirled since reports of the gift emerged this spring. But the president himself said he was unconcerned, casting the decision as a no-brainer for taxpayers. “I would never be one to turn down that kind of an offer,” the president said in May. “I mean, I could be a stupid person and say, ‘No, we don’t want a free, very expensive airplane.’”