rpm nailed it. Huckabee is a man of honest conviction on some issues...on others....his convictions change daily. That brings his motives into question.
Like Clinton, he sometimes accepts the credit for accomplishments that are not his own, while refusing to accept responsibility for his actions that have gone awry. In addition, he has a thin skin, and can be petty when criticized.
Do not, however, underestimate him. He was one of the most popular governors of Arkansas to hold the office in the last fifty years.