Karnataka Home Minister G Parameshwara on Wednesday said the Congress state President D K Shivakumar will respond to calls by some party leaders to rein in those weighing in for the Chief Minister post, in the event of leadership change in the state. As Chief Minister Siddaramaiah's petition challenging the Governor's sanction for his prosecution in a site allotment case is being heard in the High Court, Congress leaders seem to be preparing for a race to become CM with several of them openly expressing their desire. A group of Congress leaders on Tuesday wrote to Leader of Opposition in Lok Sabha Rahul Gandhi requesting him to warn party leaders including senior Ministers, who are weighing in for the Chief Minister's post, in the event of leadership change. The signatories of the letter, including current and former lawmakers and some ex-Ministers, have also asked him to direct them not to issue damaging statements in future. State Congress working president Manjunath Bhandary and