Senator Leslie Knope plans to vote in favor of two major bills. The first bill is about buying some land in Indiana and turning it into a national park. The second bill will ban any fast food restaurant from serving a 128-ounce soft drink. 21,000 constituents have called her asking her to vote against the second bill, but no constituents have called her about the national park bill. Senator Knope decides to vote in favor of the first bill, but listens to her constituents and votes against the second bill. Which model of representation do her actions embody?