Two other reasons the author left out:
1. Auditioning for VP. If Biden hadn’t run earlier, he wouldn’t have been on the radar.
2. Practice run for later. Huckabee’s odds in 2008 weren’t great. He did well enough to be labeled “front-runner” this time around.
Huckabee's prominence this round is attributable to a RINO controlled GOP that's scared to death of Sarah Palin, but can't for their very life produce a candidate that's even remotely acceptable to the American people, so they've resorted to recycled failures.
All Sarah needs to do is announce.
And I leave that to her keen sense of judgment and timing.