SUPERMAN (Wish I Could Figure This Out)

I don’t know if it happened yet, but Superman is supposed to renounce his U.S. citizenship before Friday.  Now, I’m no expert on the Man of Steel, but was he ever a citizen?  I thought he was illegal.  Or did the Kents make him legitimate?

I’m confused, but comic-con is tomorrow here in Anaheim. Maybe someone there can produce his birth certificate.