Madenli-Guzeltepe is one of the localities of İskenderun; it had 827 registered voters at the 2011 parliamentary election.
CHP took 673 of the 699 valid votes cast in the neighborhood at that election (96.3%). That puts the neighborhood 52.7 points above the party's district average. At the 2010 referendum 99.5% of the neighborhood voted 'no' — 39.1 points above the district average.
Turnout at the 2009 local election was 79.9%, 5.1 points below the district average. The picture has not changed since 2009: CHP has finished first in all of the last 4 elections.