New Delhi: Rashtriya Swayamsevak Sangh (RSS) chief Mohan Bhagwat today called on President Pranab Mukherjee at Rashtrapati Bhawan here. The Bhagwat-Mukherjee meeting, a rare one, sparked speculation in political circles though it was described as a ``courtesy call over lunch. The meeting came amid push by the Shiv Sena for