It can often feel as if politicians use a lot of words without saying much of anything. So how do journalists and citizens make sense of what’s said (and unsaid) in the many congressional reports, court decisions and campaign memoirs that pour out of Washington? This week on “Matter of Opinion,” Carlos Lozada makes the case for reading the Capitol, and uses insights from his new book, “The Washington Book,” to help his co-hosts decode everyone from Donald Trump to Mike Pence to Barack Obama.