A columnist for the Washington Post observed, “Over the decades, Congress had raised so many tariffs on imports in a frenzy of logrolling . . . .”

a. Briefly explain what the columnist means by “logrolling.” 

b. Why was logrolling often necessary when members of Congress were negotiating over raising tariffs? Wouldn’t members of Congress vote only for tariffs that they believe are in the economic interest of firms and workers in their districts? Briefly explain.