Washington: Describing the unprecedented second visit of US President Barack Obama to India as "game changing" the White House has said the Obama-Modi meeting would "elevate the nature of the relationship" between the two largest democracies of the world.

"This opportunity that the President has to go and attend (the Republic Day Parade) as the Chief Guest, really offers the opportunity to elevate the nature of our relationship," Phil Reiner, Senior Director, National Security Council for South Asia at the White House, told PTI in an interview on the eve of Obama's departure for India.