Sir,Two of a number of debates surrounding the presidency of Barack Obama have included those economic policies, often described as those of Cambridge economist John Maynard Keynes. To a lesser extent, others argue that Obama’s presidency is invalid because, as they claim, “he wasn’t born in America, but in Kenya”.In a series of interviews among a dozen Obama supporters, seen on US television recently, some interesting responses emerged.Referring to his economic policies, they were asked if they…