Think Republican Party gains in the midterms would amount to a repudiation of the liberal agenda? Not so fast, says Paul Pierson, coauthor of the much-anticipated book out this week: Winner-Take-All Politics: How Washington Made the Rich Richer and Turned Its Back on the Middle Class. Historically, the party out of power has averaged a 32-seat pickup and a two-seat gain in the Senate. "GOP gains are to be expected" he says. "We have an electorate deeply disappointed on the jobs issue."