Political leaders from Karnataka, Kerala and Tamil Nadu have been protesting in Delhi against the Centre over alleged injustice meted out to the southern states in devolution of taxes – in what comes as a fresh rift between the northern and the southern states of the country. While Karnataka Chief Minister Siddaramaiah and Deputy Chief Minister DK Shivakumar were the first to come knocking at the doors of Delhi ministers, ruling political party leaders of Kerala and Tamil Nadu have joined the protest as well.