BrickBack- I think that Democratic political consulting firms are used in general elections in order to get more Democrats elected.
Usually they offer a strategy for the candidate to follow in order to be either like it or reelected to their position. They will also speak on how other candidates in many of the political talk shows on television are doing.
Political consulting firms really aid the candidate in portraying a more favorable image in the public's mind. Dick Morris, a former political consultant for President Clinton, said they he would often do a poll as to what vacation location would be most favorable to the American public.