Congress leader Rahul Gandhi led a rally of around 200 tractors in Kerala's Wayanad today to protest against the centre's farm laws and questioned Prime Minister Narendra Modi's silence on the farmers' protests in the country. "We have pop stars commenting on situation of the farmers, but not the Prime Minister," the Congress leader, who reached his parliamentary constituency Wayanad ahead of the upcoming Kerala assembly elections, said after the six-km long tractor rally between Thrikkaipatta to Muttil.