Just look at this dude... heh.

George W. Bush USA president.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=59791

He's for sale real cheap lol. 14 dollars.

If someone can model Bush in poser 7 and sell him on renderosity for 14 dollars...
Well.. it smells to me that there are not many limits on this matter.

Unless the artist asked the US government for permissions to model, 
Bush, he's clothes and the white house.

Best Regards
LBJ Denmark