"Once Modi reportedly shared it with his close group of people, the Indian Ambassador to US, S Jaishankar, was asked to follow it up with the Americans," sources said.

"The idea to invite the President came from the Prime Minister," they said.

The Prime Minister's Office then asked Jaishankar to explore the "doability" of the idea and check out the response from the White House.

Thereafter, Jaishankar during a series of meetings explained to senior Administration officials about the significance of the Republic Day Parade and the US showed acceptance to the idea.

"In a way it is a very political gesture (to invite someone as a chief guest of the Republic day)," they said.

The American side, sources said "appreciated" the political gesture from the Prime Minister, "took a little while" to decide and finally informed the Ambassador that it is "Yes". Thereafter it was left to twitter diplomacy.

Modi announced on twitter that he has invited Obama to attend the Republic Day Parade as the Chief Guest.

The process started "after a considerable period" following a meeting between Modi and Obama at the White House on September 30.

Latest News from India News Desk