January 3, 2005 to November 16, 2008
A. Joining & Leaving the US Senate: 2005-2008
Barack Obama was elected to the United States Senate as a Democrat representing Illinois in November of 2004, where he served from January 3, 2005, until November 16, 2008, when he left after being elected President of the United States on November 4, 2008.
Obama voted in four different sessions during his time as US Senator.
B. Books Published: 2006
In 2006, his book titled The Audacity of Hope: Thoughts on Reclaiming the American Dream was published.
Source documentation to the above:
1. New York Times Article, “Obama to Leave His Senate Seat,” Nov. 13, 2008 (Accessed on 3-11-15)
2. United States Senate website (Accessed on 2-20-15)
3. Business Insider Article, “The 30 Most Famous Harvard Students Of All Time” (Accessed on 3-26-15)