Provable lying to the public, rather under oath or not, should be a crime punishable by disbarment from holding public office or any position that involves informing the public.
In a sane and just world, this would go without any need to be said. We are clearly not in a just or sane world.
If the proven lies of 0bama had been committed by George W. Bush (or any gop president), the press would have hounded them out of office long ago.