This week’s attack from Mitt in South Carolina mailboxes hits Mike Huckabee’s tax record.

This time, the former Massachusetts governor is talking taxes. A new Romney mail piece obtained by CNN takes on Huckabee and former New York City mayor Rudy Giuliani, whose record is listed under the banner “Big City, Big Spender.”

But Huckabee is the main target, with the Romney mailer calling him a “tax and spend governor” and highlighting his “21 tax increases as governor.” (Romney, meanwhile, has a “record of results.”)

Again, there’s no McCain attack. I’m putting a lot less stock in the impact of Joe Lieberman’s endorsement than others, but a surprise showing in New Hampshire could give McCain an unincumbered boost in South Carolina.