In a sign the honeymoon may be nearing an end for Gov. Bill Walker, an Alaska tribal government is blasting him for promoting a ConocoPhillips project that would result in the first oil production from federal lands in the nation's largest undeveloped reserve. The criticism - coming from the North Slope village of Nuiqsut -- may mark a turning point for a governor who rode into office with strong Alaska Native support and a popular running mate in Byron Mallott, a Tlingit from Southeast.