Presidents have been brought down before. And if he’s nothing but a walking scandal machine, it’s going to make it hard for them to elect another of his ilk.
Nixon's fall was the result of intense journalistic digging and investigation. Pressure was applied from outide. Nothing like that will be coming Obama's way from the MSM. The media has abdicated it's charter. Any non MSM journalist who raises questions is quickly branded a kook. Even by Republicans. Any of a number of Federal judges could have ordered his BC unsealed to satisfy a valid question as to his eligibility for office. It never happened. And it won't happen 4 years from now.
In the case of Clinton, it was Republicans in the Senate who stopped conviction. The system insulated and protected him.
Obama has reached home base. He's politically too big to fail.