2008 Flag of the United States 2012 › ›
United States Senate elections of 2010
Class II (33 of the 100) seats to the United States Senate and two mid-term vacancies from Class I
November 4, 2010
Harry Reid official portrait 2009 Sen Mitch McConnell official
Leader Harry Reid Mitch McConnell
Party Democratic Republican
Leader's seat Nevada Kentucky
Last election 59 seats (including 2 Independents) 41 seats
Seats before 58 seats (including 1 independent) 41 seats (per realignment of Sen. Specter and Scott Brown's victory in Massachusetts)
Senate Seats up for Election:
  Two Democratic incumbents
  Democratic incumbent
  Retiring/Defeated in Primary Democrat
  Republican incumbent
  Retiring/Defeated in Primary Republican
  No election

Elections to the United States Senate are scheduled to be held on November 2, 2010, for 36 of the 100 seats in the United States Senate. A special election for a 37th seat was held in Massachusetts on January 19, 2010, for a term that ends in January 2013.

Thirty-four of the seats are for six-year terms, beginning January 3, 2011, and ending January 2017. They will join Senate Class III, which traces its roots back to the Senators who served full six-year terms from March 4, 1789 to March 3, 1795. The other two races are for shorter terms: Delaware ending January 2015 and New York ending January 2013.

After the 2008 elections and their subsequent events, the Senate is composed of 58 Democrats, 41 Republicans, and one independent who caucus with the Democrats. Of the remaining seats currently up for election in 2010, 19 are held by Democrats (6 of whom are retiring) and 17 are held by Republicans (7 of whom are retiring).

Overview of races (36 seats)

  • Retiring Democrats (5 seats)
  • Retiring Republicans (7 seats)
  • Democratic incumbents (14 seats)
  • Republican incumbents (10 seats)

A special election for a 37th seat was held in Massachusetts on January 19, 2010.

Democratic incumbents (12 seats)

Ed Pastor of Arizona

Main article: United States Senate election in Arizona of 2010

2008 Republican presidential nominee and four-term incumbent John McCain was reelected with 77% of the vote in 2004. After winning the presidential election on November 4, 2008 and assuming the Presidency on January 20, 2009, he was replaced with Democrat Ed Pastor on November 19, 2008. Pastor is running for re-election.

One Democrat have announced that he will challenge Pastor in the primary on August 24, 2010:

  • Rodney Glassman, former Vice-Mayor of Tucson, is the likely Democratic nominee. Glassman is a businessman, author, and social entrepreneur who has raised over $1 million for charities that serve under-privileged children. He also serves in the Judge Advocate General's Corps (JAG) of the United States Air Force.

One Republican have announced that he will challenge Pastor in the general election on November 2, 2010:

During his presidential campaign, McCain won Arizona with 54% of the vote.

See also