Come on! I’m no Obama fan, but the only way these kinds of snafus (the driveway bump, and the gas) can be put at his feet is if he ignored the advice of the Secret Service.
I’m the first to bash Obama, but only when it’s legitimate. All these security breaches are probably not his fault. Assuming it’s his fault, or his incompetence that caused this security breach only makes those who oppose him look ridiculous.
Of course, I wouldn’t put it past him to create just that kind of culture in his administration that would either lead his handlers to ignore the Secret Service, or would lead the Secret Service to let their guard down.