I think he’s trying to get into the fray anyway he can:

Sen. John McCain condemned Mike Huckabee Monday for saying that, as president, he would strike at terrorists inside Pakistan’s borders with or without permission from the country’s leadership.
McCain called Huckabee’s comments naïve and said the former Arkansas governor lacks military experience needed to lead.
“I certainly wouldn’t telegraph my punches,” McCain told CNN after a campaign stop here.
“I will always do what’s necessary to preserve America’s national security, but to say something like that is totally unnecessary and probably has a not beneficial effect on our Pakistani allies who are fighting against al Qaeda and with us in Pakistan.”
On Saturday in South Carolina, Huckabee said if there was an “imminent threat” inside Pakistan, he would take military action there, even if it meant violating Pakistan’s sovereignty under international law.
“We need to make sure we are clear that if we have an actionable target in Pakistan, that we will take action on that target because if that helps save and preserve American people,” Huckabee said. “That’s the foremost thing we need to be worried about.”

Wouldn’t it be better to work with Pakistan instead of threatening to invade? I thought everyone was into negotiation before invasion, is that only with Iran?