<P> The Chief Minister of Nagaland is the chief executive of the northeast Indian state of Nagaland . As per the Constitution of India, the governor is a state's de jure head, but de facto executive authority rests with the chief minister . Following elections to the Nagaland Legislative Assembly, the state's governor usually invites the party (or coalition) with a majority of seats to form the government . The governor appoints the chief minister, whose council of ministers are collectively responsible to the assembly . Given that he has the confidence of the assembly, the chief minister's term is for five years and is subject to no term limits . </P> <P> Since 1963, ten people belonging to seven parties have served as Chief Minister of Nagaland . The first three belonged to the Naga Nationalist Organisation, including the inaugural officeholder P. Shilu Ao . The current incumbent is T.R. Zeliang of the Nagaland People's Front, in office since 19 July 2017 . </P> <Table> <Tr> <Th> No </Th> <Th> Name </Th> <Th_colspan="2"> Term of office </Th> <Th_colspan="2"> Party </Th> <Th> Days in office </Th> </Tr> <Tr> <Td> </Td> <Td> P. Shilu Ao MLA for Impur </Td> <Td> 1 December 1963 </Td> <Td> 14 August 1966 </Td> <Td> Naga Nationalist Organisation </Td> <Td> </Td> <Td> 987 days </Td> </Tr> <Tr> <Td> </Td> <Td> T.N. Angami MLA for Western Angami </Td> <Td> 14 August 1966 </Td> <Td> 22 February 1969 </Td> <Td> 924 days </Td> </Tr> <Tr> <Td> </Td> <Td> Hokishe Sema MLA for Akuluto </Td> <Td> 22 February 1969 </Td> <Td> 26 February 1974 </Td> <Td> 1831 days </Td> </Tr> <Tr> <Td> </Td> <Td> Vizol Angami MLA for Southern Angami - II </Td> <Td> 26 February 1974 </Td> <Td> 10 March 1975 </Td> <Td> United Democratic Front </Td> <Td> </Td> <Td> 378 days </Td> </Tr> <Tr> <Td> </Td> <Td> John Bosco Jasokie MLA for Kohima Town </Td> <Td> 10 March 1975 </Td> <Td> 20 March 1975 </Td> <Td> Naga National Democratic Party </Td> <Td> </Td> <Td> 11 days </Td> </Tr> <Tr> <Td>--</Td> <Td> Vacant (President's rule) </Td> <Td> 20 March 1975 </Td> <Td> 25 November 1977 </Td> <Td> N / A </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> (4) </Td> <Td> Vizol Angami MLA for Southern Angami - II </Td> <Td> 25 November 1977 </Td> <Td> 18 April 1980 </Td> <Td> United Democratic Front </Td> <Td> </Td> <Td> 876 days (Total 1254 days) </Td> </Tr> <Tr> <Td> 6 </Td> <Td> S.C. Jamir MLA for Aonglenden </Td> <Td> 18 April 1980 </Td> <Td> 5 June 1980 </Td> <Td> United Democratic Front--Progressive </Td> <Td> </Td> <Td> 49 days </Td> </Tr> <Tr> <Td> (5) </Td> <Td> John Bosco Jasokie MLA for Kohima Town </Td> <Td> 5 June 1980 </Td> <Td> 18 November 1982 </Td> <Td> Naga National Democratic Party </Td> <Td> </Td> <Td> 897 days (Total 908 days) </Td> </Tr> <Tr> <Td> (6) </Td> <Td> S.C. Jamir MLA for Aonglenden </Td> <Td> 18 November 1982 </Td> <Td> 28 October 1986 </Td> <Td> United Democratic Front--Progressive </Td> <Td> </Td> <Td> 1440 days </Td> </Tr> <Tr> <Td> (3) </Td> <Td> Hokishe Sema </Td> <Td> 29 October 1986 </Td> <Td> 7 August 1988 </Td> <Td> Indian National Congress </Td> <Td> </Td> <Td> 648 days (Total 2479 days) </Td> </Tr> <Tr> <Td>--</Td> <Td> Vacant (President's rule) </Td> <Td> 7 August 1988 </Td> <Td> 25 January 1989 </Td> <Td> N / A </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> (6) </Td> <Td> S.C. Jamir MLA for Mokokchung Town </Td> <Td> 25 January 1989 </Td> <Td> 10 May 1990 </Td> <Td> Indian National Congress </Td> <Td> </Td> <Td> 471 days </Td> </Tr> <Tr> <Td> 7 </Td> <Td> K.L. Chishi MLA for Atoizu </Td> <Td> 16 May 1990 </Td> <Td> 19 June 1990 </Td> <Td> Indian National Congress </Td> <Td> </Td> <Td> 36 days </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Vamuzo Phesao </Td> <Td> 19 June 1990 </Td> <Td> 2 April 1992 </Td> <Td> Nagaland People's Council </Td> <Td> </Td> <Td> 653 days </Td> </Tr> <Tr> <Td>--</Td> <Td> Vacant (President's rule) </Td> <Td> 2 April 1992 </Td> <Td> 22 February 1993 </Td> <Td> N / A </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> (6) </Td> <Td> S.C. Jamir MLA for Aonglenden </Td> <Td> 22 February 1993 </Td> <Td> 6 March 2003 </Td> <Td> Indian National Congress </Td> <Td> </Td> <Td> 3665 days (Total 5625 days) </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Neiphiu Rio MLA for Northern Angami - II </Td> <Td> 6 March 2003 </Td> <Td> 3 January 2008 </Td> <Td> Nagaland People's Front </Td> <Td> </Td> <Td> 1767 days </Td> </Tr> <Tr> <Td>--</Td> <Td> Vacant (President's rule) </Td> <Td> 3 January 2008 </Td> <Td> 12 March 2008 </Td> <Td> N / A </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> (9) </Td> <Td> Neiphiu Rio MLA for Northern Angami - II </Td> <Td> 12 March 2008 </Td> <Td> 24 May 2014 </Td> <Td> Nagaland People's Front </Td> <Td> </Td> <Td> 2264 (Total 4031 days) </Td> </Tr> <Tr> <Td> 10 </Td> <Td> T.R. Zeliang MLA for Peren </Td> <Td> 24 May 2014 </Td> <Td> 22 February 2017 </Td> <Td> 1005 </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Shurhozelie Liezietsu </Td> <Td> 22 February 2017 </Td> <Td> 19 July 2017 </Td> <Td> 147 </Td> </Tr> <Tr> <Td> (10) </Td> <Td> T.R. Zeliang MLA for Peren </Td> <Td> 19 July 2017 </Td> <Td> Incumbent </Td> <Td> 95 </Td> </Tr> </Table> <Tr> <Th> No </Th> <Th> Name </Th> <Th_colspan="2"> Term of office </Th> <Th_colspan="2"> Party </Th> <Th> Days in office </Th> </Tr>

Who served as the chief minister of nagaland for the longest tenure