Patriotic Presidential Card Prediction

An empty black card box is shown, and a deck of US presidents playing cards introduced.

The joker a.k.a. Uncle Sam is taken from the deck and closed safely inside the black case.

The Magician shuffles the deck and shows the pictures of the different US presidents on several of the cards, and reveals that each card in the deck is in fact different.

The spectator draws out a card from the deck.

Now the black case is opened but uncle Sam is holding something he wasn't holding before!

There printed on the joker card in his hand is the spectators chosen selection!