evidence: On the stump, the prime minister repeatedly told people that he needed more than five years to undo more than "60 years of mismanagement". Voters agreed to give him more time. [...] Many say Mr Modi has made India's elections more presidential. But strong prime ministers have often overshadowed their parties - Margaret Thatcher, Tony Blair and Indira Gandhi are some obvious examples. [...] Under Mr Modi and his powerful aide Amit Shah, the BJP has developed into a ruthless party machine. "The geographical expansion of the BJP is a very significant development," says Mahesh Rangarajan.