A top Qatari official described the offer of a plane to President Donald Trump as a "government-to-government transaction" and not a personal gift as the US president visited the country in a high-profile Middle East tour.

Although the ethical and security concerns about the president's jumbo jet gift are blatant, experts tell ABC News that the legal ramifications are more complicated.

"A gift of this size from a foreign government is unprecedented in our nation's history," said Jessica Levinson, a clinical professor of law.