Madhav Sadashivrao Golwalkar, popularly known as Guruji, was an Indian politician and political figure who served as the second Sarsanghchalak of the Rashtriya Swayamsevak Sangh, a right-wing Hindutva paramilitary organisation. From Wikipedia
Modi's first visit as Prime Minister to the RSS headquarters in Nagpur emphasized cultural nationalism, social justice, and strategic reconciliation with the Sangh.