These should be heady days for liberal Democrats, with their party controlling Congress, a Progressive Caucus boasting six dozen members and one of their own, Nancy Pelosi, serving as speaker of the House. Instead, some liberal lawmakers say they have begun to feel marginalized by Pelosi and other House leaders, who have so far played down some of the liberal concerns and charted a course toward the political middle. They have begun to complain that Pelosi has overplayed her campaign promise to "govern from the center," taking special pains to appease moderates while neglecting some long-standing bullet points on the...
