Political consulting is often thought of as an offshoot of the advertising industry, but closer to the truth is that the advertising industry began as a form of political consulting. As the political scientist Stanley Kelley once explained, when modern advertising began, the big clients were just as interested in advancing a political agenda as a commercial one.
No single development has altered the workings of American democracy in the last century so much as political consulting, an industry unknown before Campaigns, Inc. In the middle decades of the twentieth century, political consultants replaced party bosses as the wielders of political power gained not by votes but by money. […] Political management is now a diversified, multibillion-dollar industry of managers, speechwriters, pollsters, and advertisers who play a role in everything from this year’s Presidential race to the campaigns of the candidates for your local school committee. (Campaigns, now, never end. And consultants not only run campaigns; they govern. […].)
Da New Yorker.