King entered politics as an elected member of the
North Carolina House of Commons, serving from 1807 to 1809, and later became city solicitor of
Wilmington, North Carolina, in 1810. He was elected to the Twelfth, Thirteenth, and Fourteenth
Congresses, serving from March 4, 1811, until November 4, 1816, when he resigned to become Secretary of the
Legation for
William Pinkney. He served in this role during Pinkney's appointment as
Minister to Russia and during a diplomatic mission in
Naples. King was 24 years old when he was first elected to Congress. He had not reached the constitutional age of 25 when his term began, but the Twelfth Congress did not convene until November 4, 1811, at which point he was sworn in to the
House of Representatives. When he returned to the United States in 1818, King joined the westward expansion of cotton cultivation into the Deep South, purchasing property at what would later be known as "King's Bend" between present-day
Selma and
Cahaba on the
Alabama River in
Dallas County. The area was part of the newly formed
Alabama Territory, which had been recently separated from
Mississippi. He developed a large cotton
plantation based on slave labor and named it "Chestnut Hill." King and his relatives formed one of the state's largest
slaveholding families, collectively owning as many as 500 people. King was a delegate to the convention that organized the
Alabama state government. After Alabama was
admitted as the 22nd state in 1819, he was elected by the
State Legislature as a
Democratic-Republican to the
United States Senate. King aligned politically with
Andrew Jackson, and was re-elected to the Senate as a
Jacksonian in 1822, 1828, 1834, and 1841, serving from December 14, 1819, until his resignation on April 15, 1844. During the period from March to April 1824, King received a single vote at the
Democratic-Republican Party caucus to be the party's candidate for the office of vice president of the United States in the upcoming
1824 presidential election. He served as
President pro tempore of the United States Senate during the
24th through
27th Congresses. King was Chairman of the Senate
Committee on Public Lands and the
Committee on Commerce. King was appointed
Minister to France, serving from 1844 to 1846. After his return, he resumed Senate service, first by appointment and then by election to fill the vacancy caused by the resignation of
Arthur P. Bagby. He held his seat from July 1, 1848, until his resignation on December 20, 1852, due to ill health and his election as vice president of the United States. King supported slavery, arguing that the
Constitution protected the institution of slavery in both the Southern states and the
federal territories. He opposed both
abolitionist efforts to abolish slavery in the territories and
Fire-Eater calls for Southern
secession. On July 11, 1850, two days after President
Zachary Taylor died, King was appointed Senate
President pro tempore. When
Millard Fillmore became president, the vice presidency was vacant, making King first in the
line of succession under the law in effect. He also served as Chairman of the
Senate Committee on Foreign Relations. == Relationship with James Buchanan ==