It's also been reported that back in 2008 when a young staffer forwarded an email that suggested that Obama was a secret Muslim, that that person was immediately fired.
Now it's reasonable to expect that during the process of doing their 'opposition research', the Hillary people looked at this issue, but I think it's safe to say that if anything whatsoever had been found that might prove to have been credible, that we would have all heard about it. The fact that the Clinton campaign NEVER even alluded to this being true, that Obama was NOT a natural born citizen, would seem to indicate, at least me (in my humble opinion), that they found absolutely nothing.