Hamid Karzai, Afghanistan's president, is relying on ethnic affiliations to win in the country's upcoming elections.br br The support of Afghanistan's ethnic Pashtun population, to which Karzai belongs, is crucial as they constitute the majority of the country's 15 million eligible voters.br br Al Jazeera's Zeina Khodr reports from Kandahar on the tribal elders who hold sway over Afghanistan's Pashtun heartland.