Let start the joke with a question. There is a common number that arises during the end of Obama's first presidential term and when a graduate student tries to graduate. What number is that?
Four. While Obama wanted to be 4 more years of president, grad students who are going to graduate students typically would not want to get themselves into the next term. One term of study is typically 4 months in North America. So, US presidents would love to have 4 more years, while normal grad students would hate staying in school 4 more months.