Huckabee keeps on running, but why?

Don't get me wrong. I am all for the underdog. It's no coincidence, just look at my avatar on my profile. Yup, that's Underdog alright. What I can't understand is why Mike Huckabee keeps running in the Republican Primary race. He really has no chance of defeating Senator John McCain. Just think of the millions of dollars in advertising and general campaign expenses he is racking up. He should put that to better use. Maybe feeding the hungry, housing the homeless, increasing the literacy rate. He is from Arkansas after all! Mike, do the honorable thing and bow out! Oh, and could you come to New Hampshire and pick up all your political signs your supporters have have littered the highway with?

http://www.mcclatchydc.com/election2008/story/27578.html