The producers of Game of Thrones decided to use George Bush as a template for the decapitated heads in some of the show's scenes. According to E! Online, the Republican party - as you may expect - are none too happy about their choice. In the season one finale, King Joffrey (played by Jack Gleeson) shows Sansa Stark (played by Sophie Turner) a row of heads on spikes; heads that used to belong to the King's traitors.
On the DVD commentary from series one, the show's producers explain "People may not have noticed this but back up...the last head on the left is George Bush. George Bush's head appears in a couple of beheading scenes." They insist that it wasn't a considered political statement, and that they were simply making use of whatever they had knocking about the studio. "It's not a choice. It's not a political statement. It's just...we had to use what heads we had lying around."
Craig Eaton, the chairman of the Brooklyn Republican party wasn't too enthralled when he discovered that their beloved Bush had had his image used in such a manner. "Whether you like him or dislike him, whether you're of the same political persuasion or not, we still have to respect the office of the presidency and all of those who hold that presidency." He added "They didn't intend it to be political, but now that it is, they should remove it." It's highly unlikely, though, that the makers of Game of Thrones are going to be able to undo this particular insult.