Article I includes a ban on anyone serving in government accepting “any present, Emolument, Office, or Title, of any kind whatever, from any King, Prince, or foreign State” unless Congress approves. Article II says, in part, that the president cannot receive any emolument from a U.S. state.

The president grew angry when questioned about the ethical implications of accepting a luxury jetliner from a foreign government.

Despite flying for more than 35 years, the current pair of Air Force One jets remain one of the safest and secure aircraft in the world.

Qatar's offer of a luxury jet, which comes on the eve of President's Trump's visit to the Middle East, raises major ethical and legal questions.