See New York Times, "Paul’s ‘Ground Game,’ in Place Since ’08, Gives Him an Edge":
ANKENY, Iowa — It was four years ago that Ross Witt, a soft-spoken electrical engineer at John Deere, overcame his natural discomfort with knocking on hundreds of his neighbors’ doors during dinnertime as a precinct coordinator for Ron Paul’s campaign.More at the link.
But when Mr. Paul dropped out of the national race in June 2008, Mr. Witt did not stop, because, in a sense, neither did Mr. Paul: Mr. Witt and many other supporters here joined the Iowa branch of an independent political group Mr. Paul established after the race. They carried on his libertarian message, and picked local organizers. And when Mr. Paul announced that he was running for president this year, Mr. Witt and others jumped back onto his campaign, a force more motivated and efficient than before.
Alone among the Republican field, Mr. Paul, a Texas congressman, has a built-in network from 2008 that gives him a decisive organizational edge. Iowa Republicans say that advantage is an important reason some polls show him within striking distance of a victory in the Jan. 3 caucuses, with a battle-tested ground game poised to take advantage of a lack of passion for the rest of the candidates, a stark contrast to 2008, when evangelicals rallied around Mike Huckabee.
“This isn’t a year-and-a-half campaign,” Craig Robinson, a former Iowa Republican Party political director during the caucuses four years ago, said of Mr. Paul’s organization. “This is a five-year campaign.”
RELATED: At ABC News, "Ron Paul Takes Swipes at GOP Rivals, Says Michele Bachmann ‘Hates Muslims’." (Via Memeorandum.)