Impeachment is an internal to the US issue.
This is much bigger than that.
If the system of international law was functioning as it is supposed to, both Bush and Obama should be in The Hague now. Of course, it's never going to happen, and this is the problem. We've been there before - there was something called the League Of Nations some time ago, which quickly became irrelevant when the powerful states stopped paying attention to the rules it was supposed to enforce, and we know how that ended up.
The League of Nations was the first 20th century attempt of the New Whirl Oder by imperialists and failed because of WWII. Its sole purpose was to serve the needs of Empires.
Every President since LBJ has been an international criminal, and there were some before him. Domestically, every single President is a criminal but like KRS ONE said "You can never really have justice on stolen land."
I hope no one thought the criminal organization known as the United Nations was ever going to punish a US President, as they were set up to police us everyday people as well as political opponents, not their political minions.
Again my point is if we are not going to deal with the criminals within the 535 of Congress, you definately cannot expect the world, whose full of foreign govt corruption (many put in place by US) to be right either.