London, 5 November 2010: In continuation of the Wednesday commentary, "Summit & after", and especially in the backdrop of Barack Obama's "defeat" in the mid-term elections, India has to make calculated changes in its engagements with the United States. It is improbable that a prime minister as timid as Manmohan Singh will put into effect the "calculated changes" suggested by this writer, among them being to engage the US over and above the American president, encompassing the Congress, Wall Street and big business, NGOs, special interest groups, opinion-makers, the media, and so forth, but the collapsing presidency of Barack Obama gives little other choice.