If there is such a thing as a “great” traitor he certainly is one. His treachery may wind up causing far more damage to not only America but the whole of the Earth than all other treachery that has preceded it in all of history.
“Great” in this instance simply means large, big or chief or magnified... It does mot mean ethically superior.
Try Biggest Traitor. Supreme Traitor. Most Devastating traitor. Most treacherous traitor.
History will have a clearer view of the devastation.
But who will he blame? Who will be the R scapegoat when Iran gives THE bomb to a terrorist organization? The dems will not be blamed for any wrongdoing especially with respect to Iran. Nothing will be laid at his feet, nothing even is Tehran blasts one over the border to Isreal next year, while BO is still POTUS, who will he/they blame?