Mike Huckabee has the lowest per-delegate cost of any remaining candidate in the presidential race, NY Times reports. Mitt Romney is the most extravagant. On the Democratic side, Barack Obama has spent more per delegate than Hillary Clinton. Huckabee has relied on other tools:

“They say that the most dangerous place to be is between Huckabee and a cable news show,” said Scott Reed, a Republican strategist. “He went on every free outlet to get his message out. He was living off cable television. And he did exceptionally well in each of the 15 Republican debates.”