It is to the benefit of some parties that President Bush be discredited. By taking down Blair through this scandal, a far more leftist Labor party MP would become Prime Minister, and would distance himself from President Bush.
Without the UK, we would have a hard time moving forward with the war on terror.
Now, who would benefit? Obviously Iran and North Korea. Domestically, certain people are most interested in their party regaining the White House, most especially the two who were recent occupants.
Commies have no problem eating their own. The toon has sown Blair, now he reaps him.
yitbos