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There are 21 Democrats seeking re-election in 2012, with 10 Republicans and 2 Independents.
* democrats 56 * republicans 42 * independent 2
57 democratic senators and 2 independents.
As of the 2012 election, there are 53 Democratic Senators, plus 2 independents who caucus with the Democrats. There are 45 Republicans.
There are currently 57 Democratic Senators.
NONE senators serve in the senate
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Senators have 6-year terms and can run for re-election as many times as they want.
Of the 100 US senators, 13 are Jewish as of 28 November 2010.
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.
The progressive movement brought about a reform in the election of US senators. The reform provided for the direct election of senators into the legislature.