Jamir, the longest serving chief minister of Nagaland, had won from the Aonglenden seat in Mokokchong district a number of times in the past. He was staying away from the state for nearly a decade due to gubernatorial assignments in Goa and Maharashtra.
Bypoll for the Aonglenden seat was held on May 7 which saw a high voter turnout of about 88 per cent.
The by-poll was necessitated following the death of Congress MLA Nungshizenba Longkumer last year.