You know that old joke, the one that goes “How can you tell when a politician is lying? His lips are moving.” That’s Obama.
I think Obama’s skilled lying arises from the fact that he is a borderline personality, whether malignant narcissist or sociopath. These specific border personalities lie better than ordinary people because to them, the truth is always what they need it to be at the precise moment they’re speaking. During SOTUs, Obama needs the truth to be that he’s all about deficit and debt reduction, job growth, affordable insurance, and cheap energy. He therefore confidently, and with every appearance of honesty, makes statements to that effect. When he’s actually running the country, though, his truth becomes something quite different.
This short GOP video perfectly sums up Obama’s variable truths: