Former US President Barack Obama has likened Congress leader Rahul Gandhi to a student who does his coursework but lacks the aptitude to master a subject. In his latest book, Barack Obama has written this about Rahul Gandhi: "Rahul Gandhi has a nervous, unformed quality about him, as if he were a student who'd done the coursework and was eager to impress the teacher but deep down lacked either the aptitude or the passion to master the subject.