There's a strong buzz that Kamal Nath may switch to the BJP in a fresh jolt to the Congress ahead of the national elections, with sources close to him telling NDTV that he is "unhappy" with the party. The former Madhya Pradesh Chief Minister arrived in Delhi on Saturday, adding fuel to the speculation. But he hasn't met Prime Minister Narendra Modi and Home Minister Amit Shah and has only heard BJP state leaders like VD Sharma saying he is welcome to join their party, sources said.