From Reuters:

[T]he conservative Huckabee, who appeals to evangelical Christians and is seen as an effective campaigner, is taking another look at jumping in, said the two sources, who are close to Huckabee. They spoke to Reuters on the condition of anonymity.
“He is entertaining the request for conversations about it,” one of the sources said. “I do not think it is a complete 100 percent ‘I’m reconsidering’ but he hasn’t shut the door on it.”

In May, Huckabee announced on Fox News program that he would not be running in the 2012 cycle. “All factors say go, but my heart says no,” he said at the time.

Huckabee did not immediately respond to a request for comment.

UPDATE: Huckabee told Fox News host Neil Cavuto in an interview this afternoon that he was not reconsidering his decision. “It’s news to me that I’m sitting down plotting my comeback,” he said, noting he didn’t have the financial resources or organization to mount a campaign.