BHO doesn’t have a security clearance. He’s not required to & couldn’t qualify for one anyway.
http://joytiz.com/2009/barry’s-got-the-nuke-codes-but-no-security-clearance/
The president has access to the highest state secrets. Sixty nine million American voters gave him clearance. That's how it works in his case. There's nobody that tells the president, "I'm sorry sir but that information is classified. Please leave the room."
And you can guarantee a background check was performed on him and his entire family when he threw his hat into the ring for senate. Not that the results would've mattered when the voters spoke.