safe. >> for his part, obama has worried publicly for years about the possibility of an attack by a lone wolf that was, in fact, self-radicalized. as law enforcement will tell you, fred, it is incredibly difficult to track terrorists working in isolation. on the day of the attacks but before the possible isis link was discovered, obama again down played the threat isis poses. >> isil will not pose an existential threat to us. they air dangerous organization like al qaeda was. we have hardened our defenses, our homeland has never been more protected by more effective intelligence and law enforcement officials at every level they are now. >> even before the massacre in california, americans expressed doubts about obama's strategy. a survey out last month found that more than half of those polled disapproved of how the president has handled the issue.