The BJP leadership fears the Congress party is likely to try and topple the Yeddyurappa government in Karnataka. With former chief minister and Janata Dal (Secular) leader H D Kumaraswamy knocking at the Congress door, the Karnataka Congress is waiting for the signal from the party high command to begin Operation Topple after the Budget session is over. Part of the plan, it appears, is to put pressure on business houses close to the Yeddyurappa government to distance themselves from the government.