Both Sides

Seems to me:

Dems tend to use polls to figure out what We The People are thinking, and where we might wanna go if somebody actually stood up and decided to lead us somewhere.  Maybe that's partly why the Repubs hate calling them democrat-ic.  Anyway, Repubs seem to use their polling to help them decide how to attack public opinion in order to change it enough to suit their agenda.

However slight you believe them to be, there are differences.

d r i f t g l a s s has a good look at it from a wider perspective (quoting a piece from truthout.com):

But both parties are not rotten in quite the same way. The Democrats have their share of machine politicians, careerists, corporate bagmen, egomaniacs and kooks. Nothing, however, quite matches the modern GOP.