New Delhi:The decade-long rivalry between the AAP led by Arvind Kejriwal and the BJP ruling at the Centre reached a crescendo on Thursday with the arrest of the Delhi chief minister by the ED in an excise policy-linked money laundering case.The tussle between the two sides began with their almost simultaneous rise to power with the BJP led by Narendra Modi receiving a massive mandate in the 2014 Lok Sabha polls and the AAP forming the government in Delhi with a historic victory a year later by winning 67 assembly seats out of 70.Even before this, Kejriwal, after a brief stint as chief minister of Delhi in 2013, challenged Modi in a much publicised contest from Varanasi in the 2014 Lok Sabha polls, setting the stage for a rivalry that has continued over the years.