From Factcheck.org:

In the run-up to the Jan. 3 Iowa caucuses, Huckabee is running a TV ad featuring graphics that claim he was "tough on crime" and "brought Arkansas' crime rate down," and that he "cut taxes over 90 times as governor."

In fact, the violent crime rate was higher at the end of his tenure than it was the year he took office. And the tax cuts he claims credit for were minor compared with the large increases he approved, which included an increase in the state sales tax.