He is hoping that if he lies long enough the sheeple will begin to believe it.
Hoping? He doesn't have to hope. There is a solid track record of this being a consistent and reliable tactic. Americans (low info voters) are gullible, pliable and are easily fooled and influenced.
Man Made Global Warming, Housing Scam, Deficit Spending, Obamacare, Entitlements, Evil Teaparty, Bengazi, Fast and Furious, NSA data collection, etc. If the media reports it enough, it becomes absolute truth to their loyal subjects. And no amount of logic or facts will move them from their programmed position.