Castes in Indian society refer to a social group where membership is decided by birth. Members of such local groups are endogamous, i.e. they tend to enter into marital relationships among themselves. They often have related political preferences.

Caste in poltucs occurs when the caste systems brinhs some chnge in the political practice of the govt… for eg . Today DUw to strong support of castism political party try yo choose people of that caste which is more in that constituency Bcos they will vote the same caste…. hope it helps