George H. W. Bush

 was a President of the United States who, according to the Eighth Doctor, served between Ronald Reagan and Bill Clinton. (PROSE: Interference - Book One)

In 1999 he was present next to Rosa Parks as she was awarded the Congressional Medal by Bill Clinton, for her services to the Civil Rights Movement. (TV: Rosa)

Panda's nose was left scratched when George Bush ran over him on a bicycle. (AUDIO: Iris Wildthyme and the Claws of Santa) Iris Wildthyme and panda encountered a robot of President Bush that looked confused while other robot presidents were brutally violent. (PROSE: Why? Because We Like You)

Behind the scenes
Bush's forenames weren't given in Interference - Book One, but the common-sense interpretation of the passage is that the author was referencing the real-life President George H. W. Bush. His son, George W. Bush, would be elected president a year after Interference was published.

References to President Bush in Why? Because We Like You and George Bush in Iris Wildthyme and the Claws of Santa were possible references to George W. Bush.