I found this intriguing:
According to several years of nationally representative survey data, about two-thirds of Americans believe that elected representatives should “try their hardest to give the people what they want.” Remarkably, however, Republican voters are between 20 and 30 points less likely than their Democratic counterparts to agree. Moreover, people represented by a Republican member of Congress are almost 20 percentage points less likely to perceive their member as behaving that way, regardless of their own party identification.
It’s not as nefarious as it sounds. Republican voters, whether they consciously realize it or not, are more comfortable with what political scientists call “trustee-style representation,” whereby representatives use their own principled judgment when casting votes. In contrast, the “delegate style” binds legislators to constituent demands. Many Republicans — voters and lawmakers alike — cherish their principles more than they do the whims of a mostly uninformed and inattentive mass public.
…members of groups that comprise the Republican base seem especially averse to delegate-style public overtures. Even after taking account of other forces that might shape citizens’ views of lawmakers, we found that traditionalistic Christians are 23 points less likely than seculars to say that representatives should “give the people what they want.” Instead, they should “stick to their principles, no matter what the polls might say.”
…when Republicans think their representatives are getting soft, they try to hold them accountable. In surveys, we asked respondents to tell us not only what kind of representation they wanted but also the kind they thought they were actually getting. Democrats proved 23 points less supportive of their representatives when they perceived them paying too little attention to public opinion. In contrast, Republicans were up to 50 percentage points less supportive when they saw them paying too much attention.
Fourth, judging from legislative roll-call data since 1985, Republicans in Congress have been considerably less likely than Democrats to follow their constituents’ policy preferences — a tendency that has grown over time. We found that the ideological convergence between voters and legislators is more than three times greater among Democratic legislators than among Republicans.
There is yet more of interest at the link, from Monkey Cage, by David C. Barker and Christopher Jan Carman.