In keeping with his hypomanic temperament, Emanuel doesn’t need much sleep and he can’t stay still. “He’s like a shark that always has to keep moving or he dies,” says John Lapp, who worked for Emanuel. And, like Clinton, Emanuel is highly creative, not least because his hyperkinetic mind can’t stop generating ideas. “He’s an idea machine,” Sabato says.
— Field guide to the hypomanic personality – Boing Boing