There's no shortage of scintillating elements in Hillary and Clinton. First and foremost are two giants of the American stage, Laurie Metcalf and John Lithgow, giving wryly amusing - and occasionally poignant - performances that tantalize with private glimpses into very public figures. Then there's playwright Lucas Hnath, who seems ideally equipped to explore a modern political power union, having mined subversive humor and stimulating insights on marriage and gender dynamics in A Doll's House, Part 2, which won Metcalf her first Tony Award. And not to forget Joe Mantello, one of the most reliably incisive directors working on Broadway.