Political parties sometimes break up like marriages, and like remarriages, individual legislators switch parties. In both cases, the consequences can be severe. When individual legislators or a group decide to leave a party, form another party, or join another party, it could have repercussions in terms of government formation, maintenance, and termination. In Maharashtra, recently, and in Madhya Pradesh, a while ago, splits in the ruling party and a subsequent realignment of legislators inaugurated new governments.
Distinct waves
Splits and switches are commonplace in legislatures across the globe, and India has witnessed at least three distinct waves. The first wave occurred towards the latter half of the 1960s when challengers to the Congress attempted to displace it in the States. There was literally great shoving and pushing and a quick turnover of governments due to the free movement of legislators across political parties.