[DOC] [TLE] U.S. Senate: Civil War Senators' Biographies [PAR] In 1846, he resigned from the House of Representatives to command a brigade 
in ... in military uniform, he delivered his famous call to arms on August 1, 1861. [DOC] [TLE] U.S. Senate: Expulsion and Censure [PAR] At request of the Ohio legislature, Smith resigned two weeks after the vote. ... 
Three months later, on July 10, 1861, he was expelled for supporting the... [DOC] [TLE] Resignation from the United States Senate - Wikipedia [PAR] A member of the United States Senate can resign by writing a letter of resignation 
to the .... Hannibal Hamlin, Maine, January 17, 1861, Resigned to become Vice-
President of the United States. Jefferson Davis, Mississippi, January 21, 1861... [DOC] [TLE] 37th United States Congress - Wikipedia [PAR] The Thirty-seventh 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, 1861 to March 3, 1863, during the ...... John Sherman (R), 
Resigned March 12, 1861 when elected U.S. Senator. [DOC] [TLE] Expulsion from the United States Congress - Wikipedia [PAR] Expulsion is the most serious form of disciplinary action that can be taken against 
a Member of ... In 1861, after the Civil War had broken out, 11 Senators (including 
former Vice President and Kentucky ... He avoided expulsion but resigned, but 
was then re-elected by the people of South Carolina, who considered him a hero. [DOC] [TLE] Hannibal Hamlin - Wikipedia [PAR] In the latter part of February 1857, however, he resigned the governorship, and 
was again a member of the United States Senate from 1857 to January 1861. [DOC] [TLE] Jefferson Davis - American Civil War - HISTORY.com [PAR] Prior to the start of the war, Davis had argued against secession, but when 
Mississippi seceded he resigned from the U.S. Senate. In February 1861 he was
... [DOC] [TLE] James Buchanan - U.S. Presidents - HISTORY.com [PAR] In April 1861, a month after Buchanan left office, the American Civil War (1861-
1865) began ... He resigned from the Senate in 1845, when President James 
Polk... [DOC] [TLE] On Resigning from the Senate by Robert Toombs. America: II. (1818 ... [PAR] On Resigning from the Senate by Robert Toombs. ... United States Senator in 
1853; resigned in 1861; Member of the Confederate Congress in 1861; .... the 
present senior senator [Mr. Seward] was the governor of that State; and he 
refused it. [DOC] [TLE] Jefferson Davis' Farewell Address to the Senate, 1861 - Civil War Trust [PAR] Senate Chamber, U.S. Capitol, January 21, 1861. Jefferson Davis' speech to 
Senate in which he bids farewell with the belief that it is the right of the State to... [DOC] [TLE] Robert Toombs (1810-1885) - The Latin Library [PAR] He studied at the University of Georgia, graduated at Union college in 1828, ... 
Toombs resigned his seat in the United States senate in January, 1861, and in... [DOC] [TLE] Five Southern Senators Resign!  Civil War Daily Gazette [PAR] Jan 21, 2011 ... And with that, he bade the United States a final adieu. ... Jefferson Davis's 
Farewell Address in the U. S. Senate, January 21, 1861. [  ]... [DOC] [TLE] Hannibal Hamlin - National Governors Association [PAR] However, three weeks later, he resigned from the governor's office to take his 
seat in the U.S. Senate, an office he held until 1861. He also served as the U.S.... [DOC] [TLE] AAP Biography: Chase, S.P. - American Abolitionist Project [PAR] Salmon Portland Chase (1808-73) was a U.S. senator, cabinet officer, and chief 
justice of ... After resuming his U.S. Senate seat in 1861, he resigned to become... [DOC] [TLE] HAMLIN, Hannibal - Biographical Information [PAR] Senate Years of Service: 1848-1857; 1857-1861; 1869-1881 ... when he 
resigned; elected to the United States Senate as a Republican

Question: In 1861 he resigned from the U.S. Senate
Answer: Jefferson Davis