In poll-bound Karnataka, Prime Minister Narendra Modi on Sunday tore into the Congress and its leader Rahul Gandhi, charging the opposition party and its allies with being "busy digging my grave," and lashed out at the Wayanad MP for his comments on democracy in the country as an affront to its people. In his sixth visit to the southern state this year, Modi seemed to have given fresh momentum to the ruling BJP's bid for a successive term, even as rival Congress has been mounting an aggressive attack over its saffron opponent on issues including corruption.