If the majority of people in the Islamic state are against the rule of the Khalifa, can the Khalifa be replaced?

Fatwa, posted 4.22.2010, from South Africa, in:
Religious Authority: 
Ebrahim Desai
Fatwa Question or Essay Title: 
If the majority of people in the Islamic state are against the rule of the Khalifa, can the Khalifa be replaced?

In an Islamic system of leadership, majority opinion is not take into account when electing a leader as is dome in democratic dispensations. Therefore, where the majority of people are against the ruler, they have no right to depose him from his post. Yes, where the ruler has become unfit to rule, he may be removed in a systematic manner.