The "specific attacks" on the US diplomats in Cuba actually started while Obama was president, and after he "normalized" relations with Cuba.

What a great "improvement" in relations that signified.

There is also evidence that Obama downplayed and hid the threat, to protect his ill conceived détente with Cuba.
http://freebeacon.com/national-security/u-s-hiding-key-details-mystery-attacks-american-diplomats-cuba/

What a great president Obama was- endangering Americans to protect his legacy- right Joe?