Prime Minister Narendra Modi has kickstarted his campaign on West Bengal Chief Minister Mamata Banerjee's turf. He took a string of jibes at Mamata, mocking her for stalling development projects, calling her 'speed breaker didi'. Mamata Banerjee, who will also take to the campaign trail today, has decided to advance her campaign schedule to shadow the prime minister to ensure that she counters the pm's narrative real time. PM held a rally at Siliguri and is expected at Kolkata's brigade ground next, Mamata will be holding rallies in North Bengal as well.