Politics... laughing or joking matter?

As I listened to the radio last week, they had a guest on there who was Senator Barck Obama. He talked about his campaign and of course Hillary Clinton. However everything seemed as a joke to him. He mentioned that she asked him to be her vice president. He then proceeded to ask sarcastically "How can the person thats in second ask the person in first to be his vice president?" He basically tried to say that he would win so she silly for making the offer. As the radio show went on Obama made many indirect comments. This took me by suprise. I thought the president of united states was suppose to be serious. They are making the political race into a gamn to see who can come out the winner, instead of choosing who's best.