Madhya Pradesh Congress President Kamal Nath interacts with some of the newly joined party workers at PCC headquarters, in Bhopal, on Monday. A group of BJP workers reportedly left the party to join Congress on Monday. Pic/PTI

Madhya Pradesh Congress President Kamal Nath on Monday said that the country was passing through a challenging phase under Prime Minister Narendra Modi, as the country was faced with farmers' suicides.