Sen. Daniel Akaka Of Hawaii Won't Seek Re-Election
The 86-year-old said he'll finish his term and step down after 22 years in the Senate. Democrats hold a 53-47 majority in the Senate, including two independents who side with them. But they must defend 21 of the 33 seats on the ballot next year, and face a struggle to retain control.
Source: http://www.npr.org/2011/03/02/134213361/sen-daniel-akaka-of-hawaii-wont-seek-re-election?ft=1&f=1014