Kagnili ranks 34th by electorate among the 41 localities of Taşlıçay. The neighborhood has a single ballot box, and 86 voters were registered there for the 2023 parliamentary election.
68 people voted at that election. Yeşil Sol Parti took the most votes with 56; AK Parti followed with 6. Yeşil Sol Parti's share here is 21.8 points above the district average. In the presidential runoff, 35 of 40 valid votes went to Kemal Kılıçdaroğlu; across the district that share was 68.8%. At the 2017 referendum 30 of 44 valid votes were 'no'; across the district the 'no' share was 58.2%.
The neighborhood has stayed on the same line since 2014: the same political line has finished first in all of the last 6 elections (BDP in 2014, Yeşil Sol Parti in 2015, HDP in 2019, DEM Parti in 2024). Turnout at the 2024 local election was 44.6%, 34.9 points below the district average.