Speaking at the BJP headquarters, Prime Minister Narendra Modi hailed outgoing BJP chief Amit Shah as an 'outstanding karyakarta', crediting him with getting the party its highest ever tally in Lok Sabha elections. "When a Party is in Government, running the Party organisation brings with it its own set of challenges. But, under Amit Bhai the Party organisation scaled glorious heights," PM said. PM Modi praised newly elected BJP President JP Nadda, saying he was confident that the party will scale new heights under his leadership. "I am confident that under his (JP Nadda) leadership, party will go ahead by abiding its basic principles and ideologies. We will have to face more challenges than what we faced as a political party in the opposition," he said.