The lineup for tonight’s show, if they all show up, sounds like it will make for the most power-packed and entertaining Real Time of the past few years. The guests are Donna Brazile, author of her controversial memoir as a Democratic Party insider, MSNBC host Chris Matthews, filmmaker and activist Michael Moore, and outspoken comic Sarah Silverman (pictured). Sounds like an all-liberal panel for once – but it also sounds contentious, and very, very interesting.