When Barack Obama takes the oath of office in January to become the 44th President of the United States, his televersion will become the POTUS as well in Toobworld. It's a long-standing tradition in the TV Universe that the President of the Trueniverse will be the Prez for Earth Prime-Time as well. Too many shows have always incorporated the actual president in their plotlines and/or punchlines to be otherwise. (Shows like '24', 'The West Wing', and 'Hail To The Chief' have all been relegated to alternate dimensions.)
But even so, there will be some differences between the real Barack and TV's Barack.......
On "L.A. Law," Blair Underwood's character, Jonathan Rollins, was the first first black editor of the Harvard Law Review. A few years later during a visit to Harvard, Underwood recalls, "a tall brother with big ears comes up to me and says, 'I am Barack Obama and I am the first black president of the Harvard Law Review. You play me."