US President Donald Trump on Monday angrily dismissed concerns over his plans to receive a jet from Qatar to be used as Air Force One, saying it would be "stupid" not to accept such a gift.

The offer from Qatar's royal family to donate the $400 million 747-8 to be used as the US presidential plane raised major questions about ethics and security, but Trump played them down.

"It's a great gesture," the 78-year-old billionaire told reporters at the White House when asked if the oil-rich Gulf state would expect anything in exchange.

"I would never be one to turn down that kind of an offer. I mean, I could be a stupid person (and) say 'no we don't want a free, very expensive airplane.'"

Qatar's offer came after Trump repeatedly complained of delays and cost overruns in aerospace giant Boeing's contract to provide two new Air Force One jets to replace the current aging models.

Trump responded particularly angrily when asked if he would use the jet in a personal........

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