The Rashtriya Swayamsevak Sangh or the RSS, the BJP's ideological mentor, is reaping huge benefit from former president Pranab Mukherjee to its headquarters earlier this month. At a press meet in Kolkata on Monday, senior RSS leader Biplap Roy said applications to join the organisation from across the country have tripled since Mr Mukherjee went to Nagpur on June 7. A huge number of these were from Bengal.