The Illinois Senate career of Barack Obama began in with the 1997 swearing in of Obama to his first term in the Illinois Senate and ended with his 2004 election to the United States Senate. During this part of his career, Obama continued teaching constitutional law part-time at the University of Chicago Law School as he had done as a Lecturer from 1992 to 1996 and as a Senior Lecturer from 1996–2008.

In 1994, Senator Alice Palmer announced her desire to run for the United States House of Representatives, leaving the Senate's 13th district seat open. When filing opened in 1995 for her seat, Obama entered the race. Eventually, his challengers were disqualified and he won the Democratic primary unopposed in 1996. He won re-election in 1998 and 2002. During his Senate tenure, Obama was involved with a wide range of legislation. While serving, he ran unsuccessfully for the United States House of Representatives in the 2000 elections. In the redistricting following 2000 Census, the Democrats gained control of the Illinois Senate, and Obama became more active in his legislation, which included work in areas such as health care, labor, law enforcement, campaign finance reform, welfare, and community reinvestment.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.

The Illinois Senate is the upper chamber of the Illinois General Assembly, the legislative branch of the government of the state of Illinois in the United States. The body was created by the first state constitution adopted in 1818. The Illinois Senate is made up of 59 senators elected from individual legislative districts determined by population. Under the Illinois Constitution of 1970, senators are divided into three groups, each group having a two-year term at a different part of the decade between censuses, with the rest of the decade being taken up by two four-year terms. Depending on the election year, roughly one-third, two-thirds, or all Senate seats may be contested. In contrast, the Illinois House of Representatives is made up of 118 members with its entire membership elected to two-year terms. House districts are formed by dividing each Senate district in half.

The Illinois Senate convenes at the Illinois State Capitol in Springfield, Illinois. Its first official working day is the second Wednesday of January each year. Its primary duties are to pass bills into law, approve the state budget, confirm appointments to state departments and agencies, act on federal constitutional amendments and propose constitutional amendments for Illinois. It also has the power to override gubernatorial vetoes through a three-fifths majority vote. The Illinois Senate tries impeachments made by the House of Representatives, and can convict impeached officers by a two-thirds vote.

Illinois (ⁱ/ˌɪlɨˈnɔɪ/ IL-i-NOY) is the 25th most extensive and the 5th most populous of the 50 United States, and is often noted as a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a broad economic base. Illinois is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean; as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O'Hare International Airport has ranked as one of the world's busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics.

Although the state's largest population centers today are in northern Illinois, originally the state's population grew from south to north, with settlers arriving from Kentucky in the 1810s. In 1818, Illinois achieved statehood. Chicago was founded in the 1830s on the banks of the Chicago River, one of the few natural harbors on southern Lake Michigan. Railroads and John Deere's invention of the self-scouring steel plow turned Illinois' rich prairie into some of the world's most productive and valuable farmlands, attracting immigrant farmers from Germany and Sweden. By 1900, the growth of industrial jobs in the northern cities and coal mining in the central and southern areas attracted immigrants from Eastern and Southern Europe. Illinois was an important manufacturing center during both world wars. The Great Migration established a large community of African Americans in Chicago that created the city's famous jazz and blues cultures.

John Alden Fritchey, IV (born March 2, 1964) is a Democratic member of the Cook County Board of Commissioners, representing the 12th District since 2010, and a zoning attorney in Chicago. He is formerly a state representative to the Illinois House of Representatives, and a former candidate in a Democratic primary for the United States House of Representatives in 2009.

John Fritchey was born at Barksdale Air Force Base in Bossier City, Louisiana. His father John Alden Fritchey, III was a native of Olney, Illinois and a Vietnam veteran. His mother emigrated from Morocco. After living in Olney, home to three generations of his father's family, and later in Belleville, Illinois, John and his mother moved to Chicago where he attended grammar school and high school at the The Latin School of Chicago.

He earned his bachelor’s degree in economics in 1986 from the University of Michigan. Fritchey returned home to earn his law degree from Northwestern University in 1989.

After graduating from law school, Fritchey worked as an Illinois Assistant Attorney General from 1989 to 1991.