Gorbachev won the same prize in 1990. According to Wiki, "Gorbachev's attempts at reform as well as summit conferences with United States President Ronald Reagan and his reorientation of Soviet strategic aims contributed to the end of the Cold War, ended the political supremacy of the Communist Party of the Soviet Union (CPSU) and led to the dissolution of the Soviet Union. He was awarded the Nobel Peace Prize in 1990."
A year later, the Soviet Union was dissolved.
Let's see... How about "Obama's attempts at reform as well as summit conferences with Russian President Dmitry Medvedev and his reorientation of American strategic aims contributed to the end of the Cold War, ended the political supremacy of the capitalist parties of the United States and led to the dissolution of the United States of America. He was awarded the Nobel Peace Prize in 2009."
Just speculating...