Thompson Campbell was a U.S. Representative

United States House of Representatives

The United States House of Representatives is one of the two Houses of the United States Congress, the bicameral legislature which also includes the Senate.The composition and powers of the House are established in Article One of the Constitution...

 from Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being 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,...

.

Life

Born in Ireland

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

, Campbell immigrated to the United States with his parents, who settled in Chester County, Pennsylvania

Chester County, Pennsylvania

-State parks:*French Creek State Park*Marsh Creek State Park*White Clay Creek Preserve-Demographics:As of the 2010 census, the county was 85.5% White, 6.1% Black or African American, 0.2% Native American or Alaskan Native, 3.9% Asian, 0.0% Native Hawaiian, 1.8% were two or more races, and 2.4% were...

. He attended public schools, studied law, and was admitted to the bar

Admission to the bar in the United States

In the United States, admission to the bar is the granting of permission by a particular court system to a lawyer to practice law in that system. Each U.S. state and similar jurisdiction has its own court system and sets its own rules for bar admission , which can lead to different admission...

 in Pittsburgh, Pennsylvania

Pittsburgh, Pennsylvania

Pittsburgh is the second-largest city in the US Commonwealth of Pennsylvania and the county seat of Allegheny County. Regionally, it anchors the largest urban area of Appalachia and the Ohio River Valley, and nationally, it is the 22nd-largest urban area in the United States...

. He later moved to Galena, Illinois

Galena, Illinois

Galena is the county seat of, and largest city in, Jo Daviess County, Illinois in the United States, with a population of 3,429 in 2010. The city is a popular tourist destination known for its history, historical architecture, and ski and golf resorts. Galena was the residence of Ulysses S...

, and engaged in mining.

Campbell served as the Illinois Secretary of State from 1843 until his resignation in 1846. He was a delegate to the state constitutional convention in 1847.

He was elected as a Democrat

Democratic Party (United States)

The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...

 to the 32nd Congress

32nd United States Congress

The Thirty-second United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1851 to March 3, 1853, during the third and...

 in 1850, and was an unsuccessful candidate for reelection in 1852.

He was a delegate at the 1852 Democratic National Convention

1852 Democratic National Convention

The 1852 Democratic National Convention was held at Maryland Institute in Baltimore, Maryland. This convention is notable for the hostility between groups of the party, divided over the Compromise of 1850. The convention was called to order by Democratic National Committee chairman Benjamin F....

 and was appointed United States land commissioner for California

Public Land Commission

The Public Land Commission, a former agency of the United States government, was created following the admission of California as a state in 1850 . The Commission's purpose was to determine the validity of prior Spanish and Mexican land grants in California.California Senator William M...

 by President Pierce

Franklin Pierce

Franklin Pierce was the 14th President of the United States and is the only President from New Hampshire. Pierce was a Democrat and a "doughface" who served in the U.S. House of Representatives and the Senate. Pierce took part in the Mexican-American War and became a brigadier general in the Army...

 in 1853 and served until he resigned in 1855.

At the 1860 Democratic National Convention

1860 Democratic National Convention

The 1860 Democratic National Convention was one of the crucial events in the lead-up to the American Civil War. Following a fragmented official Democratic National Convention that was adjourned in deadlock, two more presidential nominating conventions took place: a resumed official convention,...

, he served as a delegate in Charleston, North Carolina and became an elector at large on the Breckinridge

John Breckinridge

John Breckinridge or Breckenridge may refer to:*John Breckinridge , United States Senator and Attorney General...

 ticket.

During the Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

, he served in the California House of Representatives as a member of the Union Party

Union Party

Union Party may be:* Union Party , a political party of the Faroe Islands* Union Party , a political party of Ukraine* Papua and Niugini Union Pati, a political party of Papua New Guinea...

 and was a delegate to the 1864 Republican National Convention

1864 Republican National Convention

The 1864 Republican National Convention, the presidential nominating convention of the Republican Party of the United States, took place from June 7 to June 8, 1864 in Baltimore, Maryland....

.

He died in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

on December 6, 1868 and is interred in Laurel Hill Cemetery.