Nigeria, May 12 -- Former President Donald Trump's visit to the Gulf region this week has been overshadowed by a swirling controversy surrounding a reported $400 million luxury Boeing 747-8 jet linked to the Qatari royal family.

The jet was allegedly proposed for temporary use as Air Force One and later as part of Trump's presidential library foundation.

On Sunday, May 11, ABC News broke the story that a highly customized super-luxury Boeing 747-8 jumbo jet described as a "flying palace" was being prepared for Trump's use during his second term in office.

The report stated that the aircraft, reportedly worth $400 million, would be announced during Trump's ongoing three-nation tour of the Gulf and eventually donated to his foundation. ...