Moreover, Ahmadinejad is in standing violation of the Genocide Conventions prohibition against the “direct and public incitement to genocide,” which alone should be cause for exclusion. If it be argued that no precedent exists for excluding an sitting president, it should be recalled that Austrian president Kurt Waldheim was placed on the “US Watchlist” for his participation in the persecution of civilian populations during the Second World War.
http://www.jpost.com/servlet/Satellite?cid=1191257215267&pagename=JPost%2FJPArticle%2FShowFull