Barack Obama wants the world to know how much he loves singing. In his new podcast, which takes the form of a series of conversations with Bruce Springsteen, he’s rarely without a tune on his lips. ‘Further on up the road…/ you been laughing, pretty baby…’ A shower-singer, a bedroom warbler, an Air Force One air guitarist with an okay voice, the former president is proof that you really can be embarrassing without feeling an ounce of embarrassment.