It’s unlikely Obama would be sued for identity theft, since the identity he’s alleged to have usurped is that of a dead guy born in 1890. Not much cause of action for personal damages there!
Sure the dead guy has some distant relative who could sue on his behalf?
His Social Security numbers are that of Harrison J. Bounel and Lucille Ballantyne, but his Birth Certificate is allegedly the record stolen from Virginia Sunahara.