By the time the curtain came down on this starry but sluggish production, and a nominee had been formally announced, I did feel as if I’d endured a particularly fractious and constipated evening at a political convention. Need I add that acquiring this experience has never been one of my great ambitions? ... I’m not sure Mr. Jones’s presence can be classified as color-blind casting.But no matter: this consummate actor digs into his role with a relish you can surely sense from the back row of the balcony. He all but swamps the stage with Hockstader’s hearty bonhomie and zest for the machinations of backroom deal making, but also succeeds in inflecting his character — in the last rounds of a losing battle with cancer — with a moving sense of his mortality. He also earns robust laughs with some of Mr. Vidal’s piercingly funny lines collapsing the distance between the politics of mid-20th-century America and today.