Oh yes it has... Al Gore took his swipes at the Bush Administration. However, if there is any defense of it at all he was at least heavily involved in the Climate Change discussions and that is a good deal of what he talked about but he did question the Iraq policy.
Cheney, on the other hand, didn't wait for the paint to dry on the Oval Office door before condeming the new administration. He also has no visible hobby/ job other than taking swipes at President Obama. He needs to retire somewhere far, far away without internet or phone. LOL