Incumbent Senator Joe Lieberman, a Democrat, is running as an independent after he lost the Democratic primary in August.

NPR: Sen. Lieberman's Future Democratic Relations

Just over a year ago in May 2007, Senator Christopher Dodd, in his capacity as a senior Democrat on the Senate Foreign Relations Committee and as Chairman of the Subcommittee on the Western Hemisphere, Peace Corps and Narcotics Affairs, sent a letter to Secretary of State Condoleeza Rice with a laundry list of complaints about paramilitary and narco-trafficker infiltration of the Colombian government.

CENTERFORSECURITYPOLICY: The new battlefield in Latin America

The junior Senator, Ben Nelson, is a Democrat, but as one resident of the town of Broken Bow told us on a visit last week, he votes Republican a lot.

NPR: Economic Check-Up in Broken Bow

Thurmond, already the oldest man ever to serve as senator, he now surpasses the length of service record set by Arizona Democrat Carl Hayden January 2, 1969.

CNN: AllPolitics - Strom Thurmond Becomes Longest-Serving US Senator

There was nothing to save Mr Barnes and his fellow Democrat, Senator Max Cleland, from the wrath of conservative rural voters such as Mr Morrow.

ECONOMIST: Georgia goes Republican: The rain fell | The

Rush said he will take that argument to the Congressional Black Caucus as well as U.S. senators -- including Dick Durbin, a Democrat and Illinois' senior senator.

CNN: Obama chides Illinois governor's decision to fill Senate seat

Senator CLAIRE MCCASKILL (Democrat, Missouri): I mean, I'm talking as a woman who took my breast pump to work for all three of my children.

NPR: Candidates Vie For Female Voters' Attention

Senator PATRICK LEAHY (Democrat, Vermont): Our great country, America, was once viewed as a leader in human rights in the rule of law and justly so.

NPR: Senate to Hold Hearings on Guantanamo Prison Camp

Mr Obama got a further boost when Senator Arlen Specter of Pennsylvania announced that he would switch parties and run for re-election as a Democrat in 2010.

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