[['state (class)', 'vacator', 'reason for change', 'successor', 'date of successors formal installation'], ['missouri (3)', 'vacant', 'did not take seat until after congress commenced', 'waldo p johnson (d)', 'march 17 , 1861'], ['kansas (2)', 'vacant', 'election not recognized by us senate', 'james h lane (r)', 'april 4 , 1861'], ['kansas (3)', 'vacant', 'election not recognized by us senate', 'samuel c pomeroy (r)', 'april 4 , 1861'], ['north carolina (2)', 'thomas bragg (d)', 'withdrew march 6 , 1861 , expelled later in 1861', 'vacant thereafter', 'vacant thereafter'], ['texas (1)', 'louis t wigfall (d)', 'withdrew march 23 , 1861', 'vacant', 'vacant for remainder of term'], ['north carolina (3)', 'thomas l clingman (d)', 'withdrew march 28 , 1861 , expelled later in 1861', 'vacant thereafter', 'vacant thereafter'], ['illinois (2)', 'stephen a douglas (d)', 'died june 3 , 1861. successor was appointed', 'orville h browning (r)', 'june 26 , 1861'], ['texas (2)', 'john hemphill (d)', 'expelled july , 1861', 'vacant', 'vacant for remainder of term'], ['arkansas (2)', 'william k sebastian (d)', 'expelled july 11 , 1861', 'expelled july 11 , 1861', 'vacant thereafter'], ['arkansas (3)', 'charles b mitchel (d)', 'expelled july 11 , 1861', 'expelled july 11 , 1861', 'vacant thereafter'], ['michigan (2)', 'kinsley s bingham (r)', 'died october 5 , 1861. successor was elected', 'jacob m howard (r)', 'january 17 , 1862'], ['tennessee (1)', 'andrew johnson (d)', 'resigned march 4 , 1862', 'vacant thereafter', 'vacant thereafter'], ['rhode island (1)', 'james f simmons (r)', 'resigned august 15 , 1862. successor was elected', 'samuel g arnold (r)', 'december 1 , 1862'], ['new jersey (1)', 'john r thomson (d)', 'died september 12 , 1862. successor was appointed', 'richard s field (r)', 'november 21 , 1862']]
Arkansas , Texas , North Carolina and Kansa are all listed 2 time in the table
[ENT] , [ENT] , [ENT] and [ENT] are all listed 2 time in the table