The Bharatiya Janata Party (BJP) looks set to emerge as the single largest party in the Karnataka assembly as results of the May 12 elections continue to be come in. But the Congress has already offered external support to the Janata Dal (Secular) to form the government in the state. Whichever party or coalition comes to power, what cannot be denied is that Prime Minister Narendra Modi once again turned out to be the BJP's trump card and helped turn the tide in its favour in these elections. How did the PM do it? How did he help his party surge ahead? Watch this video to know the answers.