There are 21 Democrats seeking re-election in 2012, with 10 Republicans and 2 Independents.
six
As of the 2012 election, there are 53 Democratic Senators, plus 2 independents who caucus with the Democrats. There are 45 Republicans.
* democrats 56 * republicans 42 * independent 2
57 democratic senators and 2 independents.
In the 2008 Presidential election, there were 23 Democratic delegates for South Dakota at the Democratic Convention. Currently, South Dakota will have 24 delegates for 2012.
NONE senators serve in the senate
There are currently 57 Democratic Senators.
51
In January 2018, there were 49 Democratic senators in the United States Senate. Additionally, two independent senators, Bernie Sanders and Angus King, caucused with the Democrats, effectively bringing the total to 51 senators who voted with the Democratic Party. The Republican Party held the majority with 51 senators at that time.
Senators have 6-year terms and can run for re-election as many times as they want.
Tom Udall (D) and Martin Heinrich (D) are the U.S. Senators representing New Mexico. Udall's next election will be in 2020. Heinrich's next election will be in 2018.
1/3 of the Senators' terms expire in every 2 years, but since there are 50 states with two Senators apiece and that does not divide by 3, in two election years 34 Senators are elected (or re-elected) and in the third year the remaining 32.