Wikipedia is not your best source of info on this type of issue. I was married to a person who did some of these briefings. As Bob accurately stated in post 38, it is a two-tiered presentation. The POTUS is supposed to get the oral briefing so that he can not only ask questions, but also direct his intelligence agencies to dig deeper/get more info on areas he deems serious and/or a threat. Obama is lazy and detached. He probably wasn’t even listening on those occasions when he actually took the oral briefing. Obviously he didn’t read the report, or he wouldn’t have been “blindsided” by ISIS.
Here’s a good article for you to look at. It details at least three times the Obama Administration was warned of ISIS—and was written by an MSMer, no less:
http://abcnews.go.com/Politics/times-obama-administration-warned-isis-threat/story?id=25843517
Thanks for the link.