The 2008 United States Senate elections were held on November 4, 2008, with 35 of the 100 seats in the Senate being contested. 33 seats were up for regular elections; the winners were eligible to serve 6-year terms from January 3, 2009, to January 3, 2015, as members of Class 2. There were also 2 special elections, the winners of those seats would finish the terms that ended on January 3, 2013. The presidential election, which was won by Democrat Barack Obama, elections for all House of Representatives seats; elections for several gubernatorial elections; and many state and local elections occurred on the same date.
Jerry Sonnenberg is an American farmer and politician who serves on the Logan County commission. He served in the Colorado Senate from the 1st district as a member of the Republican Party. During his tenure in the state senate he served as the President pro tempore. Prior to his tenure in the state senate he served in the Colorado House of Representatives from the 65th district.
Kevin Priola is an American politician who serves in the Colorado Senate from the 13th district as a member of the Democratic Party. Prior to decennial redistricting he also represented the 25th district. Prior to his tenure in the state senate he served in the Colorado House of Representatives from the 30th and 56th districts from 2009 to 2017. Until 2022, he served as a member of the Republican Party.
Randy L. Baumgardner is an American politician who served in the Colorado House of Representatives from the 57th district from 2009 to 2013, and in the Colorado Senate from the 8th district from 2013 to 2019, as a member of the Republican Party. Baumgardner resigned after more allegations came out against him following an unsuccessful expulsion vote.
Evie Hudak is an American politician who served in the Colorado Senate from the 19th district as a member of the Democratic Party from 2009 to 2013. Prior to her tenure in the state senate she served on the Colorado State Board of Education from the 2nd congressional district from 2001 to 2009.
Lawrence G. Liston is an American politician who serves in the Colorado Senate from the 10th district as a member of the Republican Party. He served in the Colorado House of Representatives from the 16th district from 2005 to 2013, and 2017 to 2021.
Andrew Steven Kerr is an American teacher and politician who serves on the county commission in Jefferson County, Colorado. Prior to his tenure on the county commission he served in the Colorado House of Representatives from the 26th district from 2006 to 2013, and in the Colorado Senate from the 22nd district from 2013 to 2019, as a member of the Democratic Party.
The 2014 United States Senate elections were held on November 4, 2014. A total of 36 seats in the 100-member U.S. Senate were contested. 33 Class 2 seats were contested for regular 6-year terms to be served from January 3, 2015, to January 3, 2021, and 3 Class 3 seats were contested in special elections due to Senate vacancies. The elections marked 100 years of direct elections of U.S. senators. Going into the elections, 21 of the contested seats were held by the Democratic Party, while 15 were held by the Republican Party.
Daniel Kagan is an American politician who served in the Colorado Senate from the 26th district from 2017 to 2019, and in the Colorado House of Representatives from the 3rd district from 2009 to 2017, as a member of the Democratic Party.
Sanford Edmund Lee is an American politician. He served in the Colorado Senate from the 11th district as a member of the Democratic Party. Prior to his tenure in the state senate he served in the Colorado House of Representatives from the 18th district.
Joann Ginal is an American politician who serves in the Colorado Senate from the 14th district since 2019, as a member of the Democratic Party. Before her tenure in the state senate she served in the Colorado House of Representatives from the 52nd district from 2013 to 2019.
Tracy Kraft-Tharp is an American teacher and politician who serves on the county commission in Jefferson County, Colorado. Prior to her tenure on the county commission she served in the Colorado House of Representatives from the 29th district from 2013 to 2021, as a member of the Democratic Party.
Justin David Everett is an American politician who served in the Colorado House of Representatives from the 22nd district from 2013 to 2019, as a member of the Republican Party. During his tenure in the state house he was referred to as Dr. No for his opposition to large amounts of legislation with him being the legislator who voted against the most legislation.
John William Buckner was an American educator and politician who served in the Colorado House of Representatives from the 40th district from 2013 to 2015, as a member of the Democratic Party. He was the first black person to represent the 40th district in the state house.
United States gubernatorial elections were held on November 6, 2018, in 36 states and three territories. These elections formed part of the 2018 United States elections. Other coinciding elections were the 2018 United States Senate elections and the 2018 United States House of Representatives elections.
The 2020 United States Senate elections were held on November 3, 2020, with the 33 class 2 seats of the Senate contested in regular elections. Of these, 21 were held by Republicans, and 12 by Democrats. The winners were elected to 6-year terms from January 3, 2021, to January 3, 2027. Two special elections for seats held by Republicans were also held in conjunction with the general elections: one in Arizona, to fill the vacancy created by John McCain's death in 2018; and one in Georgia, following Johnny Isakson's resignation in 2019. These elections ran concurrently with the 2020 United States presidential election in which incumbent president Donald Trump lost to Democratic nominee Joe Biden.
The 2022 United States Senate elections were held on November 8, 2022, concurrently with other midterm elections at the federal, state, and local levels. Regularly scheduled elections were held for 34 of the 100 seats in the U.S. Senate, the winners of which will serve 6-year terms beginning with the 118th United States Congress. 2 special elections were held to complete unexpired terms. While pundits considered the Republican Party a slight favorite to gain control of the Senate, the Democrats outperformed expectations and expanded the majority they had held since 2021, gaining a seat for a functioning 51–49 majority.
Stephen Fenberg is an American politician who serves in the Colorado Senate from the 18th district, since 2017, as a member of the Democratic Party. He serves as President of the Senate and served as Majority Leader from 2019 to 2022.
Susan Lontine is an American politician who served in the Colorado House of Representatives from the 1st district as a member of the Democratic Party.
The 1932 United States Senate elections in Colorado took place on November 8, 1932. Incumbent Republican Senator Charles W. Waterman announced that he would not seek re-election to a second term. Attorney Karl C. Schuyler won the Republican nomination to succeed Waterman and faced former Senator Alva B. Adams, the Democratic nominee, in the general election.
