In today?s media-driven world, every presidential election is preceded by months-and sometimes years-of campaigning. Candidates must use television, social media, and good old-fashioned door-to-door canvassing to take their message to the public. In addition to presenting their platforms, they need to appeal to a wide variety of voters from different backgrounds. Campaigns have become a huge business, requiring millions of dollars in funding. Associated industries such as polling and data collection have exploded as candidates seek to gather all the information they can about public opinion.