The 110th United States Congress began on January 3, 2007. There were 10 new senators (eight Democrats, one Republican, one independent) and 54 new representatives (41 Democrats, 13 Republicans) at the start of its first session. Additionally, two senators (both Republicans) and 13 representatives (nine Democrats, four Republicans) took office on various dates in order to fill vacancies during the 110th Congress before it ended on January 3, 2009.
The representatives comprise a diverse group reflecting the multiculturalism of the United States. One representative graduated with a high school class of 25; another is said to have a net worth of $50 million. Backgrounds include teachers, musicians, authors, engineers, a vice admiral, and a professional football player. Religions include Christianity, Buddhism, Judaism, and Islam (none claims to be atheist or agnostic). When taking office, ages ranged from 33 to 66, placing the class mostly in the baby boomer and generation X categories. Of this group 12 are female.
| State | Image | Senator | Took office | Party change | Prior background | Birth year |
|---|---|---|---|---|---|---|
| Wyoming |  | John Barrasso (R) | June 25, 2007 | No Appointed; replaced Craig Thomas (R) | Wyoming Senate | 1952 |
| Mississippi |  | Roger Wicker (R) | December 31, 2007 | No Appointed; replaced Trent Lott (R) | U.S. House of Representatives Mississippi Senate | 1951 |
| District | Image | Representative | Party change | Prior background | Birth year |
|---|---|---|---|---|---|
| Arizona 5 |  | Harry Mitchell (D) | Yes | Mayor of Tempe | 1940 |
| Arizona 8 |  | Gabby Giffords (D) | Yes | State Senator | 1970 |
| California 11 |  | Jerry McNerney (D) | Yes | Engineer | 1951 |
| California 22 |  | Kevin McCarthy (R) | No | State Assemblyman | 1965 |
| Colorado 5 |  | Doug Lamborn (R) | No | State Senator | 1954 |
| Colorado 7 |  | Ed Perlmutter (D) | Yes | State Senator | 1953 |
| Connecticut 2 |  | Joe Courtney (D) | Yes | State Representative | 1953 |
| Connecticut 5 |  | Chris Murphy (D) | Yes | State Senator | 1973 |
| Florida 9 |  | Gus Bilirakis (R) | No | State Representative | 1963 |
| Florida 11 |  | Kathy Castor (D) | No | Hillsborough County Commissioner | 1966 |
| Florida 13 |  | Vern Buchanan (R) | No | Business owner | 1951 |
| Florida 16 |  | Tim Mahoney (D) | Yes | COO of vFinance | 1956 |
| Florida 22 |  | Ron Klein (D) | Yes | State Senator | 1957 |
| Georgia 4 |  | Hank Johnson (D) | No | County Commissioner | 1954 |
| Hawaii 2 |  | Mazie Hirono (D) | No | Lieutenant Governor | 1947 |
| Idaho 1 |  | Bill Sali (R) | No | State Representative | 1954 |
| Illinois 6 |  | Peter Roskam (R) | No | State Senator | 1961 |
| Illinois 17 |  | Phil Hare (D) | No | Union President | 1949 |
| Indiana 2 |  | Joe Donnelly (D) | Yes | Lawyer | 1955 |
| Indiana 8 |  | Brad Ellsworth (D) | Yes | Vanderburgh County Sheriff | 1958 |
| Indiana 9 |  | Baron Hill (D) | Yes | former U.S. Representative | 1953 |
| Iowa 1 |  | Bruce Braley (D) | Yes | Lawyer | 1957 |
| Iowa 2 |  | David Loebsack (D) | Yes | Political Science Professor | 1952 |
| Kansas 2 |  | Nancy Boyda (D) | Yes | Chemist | 1955 |
| Kentucky 3 |  | John Yarmuth (D) | Yes | Publisher | 1947 |
| Maryland 3 |  | John Sarbanes (D) | No | Lawyer | 1962 |
| Michigan 7 |  | Tim Walberg (R) | No | State Representative | 1951 |
| Minnesota 1 |  | Tim Walz (D) | Yes | Teacher | 1964 |
| Minnesota 5 |  | Keith Ellison (D) | No | State Representative | 1963 |
| Minnesota 6 |  | Michele Bachmann (R) | No | State Senator | 1956 |
| Nebraska 3 |  | Adrian Smith (R) | No | State Legislator | 1970 |
| Nevada 2 |  | Dean Heller (R) | No | Secretary of State | 1960 |
| New Hampshire 1 |  | Carol Shea-Porter (D) | Yes | Social Worker | 1954 |
| New Hampshire 2 |  | Paul Hodes (D) | Yes | Assistant State Attorney General | 1951 |
| New York 11 |  | Yvette D. Clarke (D) | No | New York City Council member | 1964 |
| New York 19 |  | John Hall (D) | Yes | Musician | 1948 |
| New York 20 |  | Kirsten Gillibrand (D) | Yes | Lawyer | 1966 |
| New York 24 |  | Michael Arcuri (D) | Yes | Oneida County District Attorney | 1959 |
| North Carolina 11 |  | Heath Shuler (D) | Yes | Real estate professional and former NFL player | 1971 |
| Ohio 4 |  | Jim Jordan (R) | No | State Senator | 1964 |
| Ohio 6 |  | Charlie Wilson (D) | No | State Senator | 1943 |
| Ohio 13 |  | Betty Sutton (D) | No | State Representative | 1963 |
| Ohio 18 |  | Zack Space (D) | Yes | City Law Director | 1961 |
| Oklahoma 5 |  | Mary Fallin (R) | No | Lieutenant Governor | 1954 |
| Pennsylvania 4 |  | Jason Altmire (D) | Yes | Healthcare Executive | 1968 |
| Pennsylvania 7 |  | Joe Sestak (D) | Yes | Navy vice admiral | 1951 |
| Pennsylvania 8 |  | Patrick Murphy (D) | Yes | Professor | 1973 |
| Pennsylvania 10 |  | Chris Carney (D) | Yes | Associate Professor | 1959 |
| Tennessee 1 |  | David Davis (R) | No | State Representative | 1959 |
| Tennessee 9 |  | Steve Cohen (D) | No | State Senator | 1949 |
| Texas 22 |  | Nick Lampson (D) | Yes | former U.S. Representative | 1945 |
| Texas 23 |  | Ciro Rodriguez (D) | Yes | former U.S. Representative | 1946 |
| Vermont At-Large |  | Peter Welch (D) | Yes/No [1] | State Senator | 1947 |
| Wisconsin 8 |  | Steve Kagen (D) | Yes | Medical Doctor | 1949 |
| District | Representative | Took office | Party change | Prior background | Birth year | |
|---|---|---|---|---|---|---|
| Georgia 10 |  | Paul Broun (R) | July 17, 2007 | No | Medical Doctor | 1946 |
| California 37 |  | Laura Richardson (D) | August 21, 2007 | No | State Assemblywoman | 1962 |
| Massachusetts 5 |  | Niki Tsongas (D) | October 16, 2007 | No | College dean | 1946 |
| Ohio 5 |  | Bob Latta (R) | December 11, 2007 | No | State Representative | 1956 |
| Virginia 1 |  | Rob Wittman (R) | December 11, 2007 | No | State Delegate | 1959 |
| Illinois 14 |  | Bill Foster (D) | March 8, 2008 | Yes | Physicist | 1955 |
| Indiana 7 |  | André Carson (D) | March 11, 2008 | No | City Councilor | 1974 |
| Mississippi 1 |  | Travis Childers (D) | May 13, 2008 | Yes | County Clerk | 1958 |
| Louisiana 1 |  | Steve Scalise (R) | May 3, 2008 | No | State Senator | 1965 |
| Louisiana 6 |  | Don Cazayoux (D) | May 3, 2008 | Yes | State Representative | 1964 |
| California 12 |  | Jackie Speier (D) | May 14, 2008 | No | State Senator | 1950 |
| Maryland 4 |  | Donna Edwards (D) | June 17, 2008 | No | Community activist | 1958 |
| Ohio 11 |  | Marcia Fudge (D) | November 18, 2008 | No | Mayor of Warrensville Heights | 1952 |
Since Arizona became a U.S. state in 1912, it has sent congressional delegations to the United States Senate and United States House of Representatives, beginning with the 63rd United States Congress in 1913. Before becoming a state, the Arizona Territory elected a non-voting delegate at-large to Congress from 1864 to 1912. Each state elects two senators to serve for six years, and varying numbers of members of the House, depending on state population, to two-year terms. Arizona has sent nine members to the House in each delegation since the 2010 United States Census.
These are tables of congressional delegations from Indiana to the United States House of Representatives and the United States Senate.
The 1956 United States Senate elections were elections for the United States Senate that coincided with the re-election of President Dwight D. Eisenhower. The 32 seats of Class 3 were contested in regular elections, and three special elections were held to fill vacancies. Although Democrats gained two seats in regular elections, the Republicans gained two seats in special elections, leaving the party balance of the chamber unchanged.
The 2008 United States House of Representatives elections were held on November 4, 2008, to elect members to the United States House of Representatives to serve in the 111th United States Congress from January 3, 2009, until January 3, 2011. It coincided with the election of Barack Obama as president. All 435 voting seats, as well as all 6 non-voting seats, were up for election. The Democratic Party, which won a majority of seats in the 2006 election, expanded its control in 2008.
Party divisions of United States Congresses have played a central role on the organization and operations of both chambers of the United States Congress—the Senate and the House of Representatives—since its establishment as the bicameral legislature of the Federal government of the United States in 1789. Political parties had not been anticipated when the U.S. Constitution was drafted in 1787, nor did they exist at the time the first Senate elections and House elections occurred in 1788 and 1789. Organized political parties developed in the U.S. in the 1790s, but political factions—from which organized parties evolved—began to appear almost immediately after the 1st Congress convened. Those who supported the Washington administration were referred to as "pro-administration" and would eventually form the Federalist Party, while those in opposition joined the emerging Democratic-Republican Party.
The 1887 United States Senate election in New York was held from January 18 to 20, 1887, by the New York State Legislature to elect a U.S. Senator to represent the State of New York in the United States Senate. Incumbent Republican Senator Warner Miller was not renominated by the Republican legislative caucus and was succeeded by Frank Hiscock.
The 1886–87 United States Senate elections were held on various dates in various states. As these U.S. Senate elections were prior to the ratification of the Seventeenth Amendment in 1913, senators were chosen by state legislatures. Senators were elected over a wide range of time throughout 1886 and 1887, and a seat may have been filled months late or remained vacant due to legislative deadlock. In these elections, terms were up for the senators in Class 1.
The 2018 United States Senate elections were held on November 6, 2018. Among the 100 seats, the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi. The regular election winners were elected to 6-year terms running from January 3, 2019, to January 3, 2025. Senate Democrats had 26 seats up for election, while Senate Republicans had 9 seats up for election.
The 2024 United States Senate elections were held on November 5, 2024, as part of the 2024 United States elections. 34 out of the 100 seats in the U.S. Senate were contested in regular elections. Senators are divided into 3 classes whose 6-year terms are staggered so that a different class is elected every 2 years. Class 1 senators faced election in 2024.
The 2026 United States Senate elections are scheduled to be held on November 3, 2026, with 33 of the 100 seats in the Senate being contested in regular elections, the winners of which will serve 6-year terms in the United States Congress from January 3, 2027, to January 3, 2033. Senators are divided into 3 groups, or classes, whose terms are staggered so that a different class is elected every 2 years. Class 2 senators were last elected in 2020, and will be up for election in 2032.
