DUBAI, May 20 (Reuters) - Qatar's offer to gift U.S.

President Trump a Boeing 747-8 airplane is a "normal

thing that happens between allies", Prime Minister Sheikh

Mohammed bin Abdulrahman Al Thani said on Tuesday at an economic

forum held in Doha.

Al Thani dismissed concerns about Qatar trying to buy

influence with its key ally, after U.S. Senate Democratic leader

Chuck Schumer introduced a bill on Monday that would prevent any

foreign aircraft operating as Air Force One, the plane that

transports the U.S. president.

"I hope that the United States looks to Qatar as a reliable

partner in diplomacy that is not trying to buy influence," Al

Thani said.

Trump shrugged off ethical concerns, saying it would be

"stupid" to turn down the generous offer.

He said the Boeing 747-8 would eventually be donated to his

presidential library - a repository housing research materials

from his administration, and that he had no plans to use it for

personal reasons after leaving office.