Lambert retired in January 2015 after 22 years as executive director of the Tribal Gaming Commission. As a candidate for chief, Lambert said he would start an office of employee rights, deal with the tribe's drug problem, focus on tourism and its economic benefits, and protect the rights of the people as a sovereign nation. He also said the government-owned local newspaper, the
Cherokee One Feather, was not truly independent despite the free press act, and he intended to make changes to ensure its independence. As one of five candidates, he received 59 percent of the vote in the June 2015 primary. Lambert won the general election in September 2015 with 71 percent of the vote; the highest vote total ever garnered by a Principal Chief candidate.
Internal political strife Lambert suspected previous tribal administration of misusing tribal funds. In April 2016, Lambert presented results of a forensic audit to the Tribal Council. He asked the
FBI to conduct its own investigation. The Tribal Council ordered an investigation of Lambert in August 2016. After the investigation was completed January 18, 2017, the tribal council voted to
impeach Lambert. The FBI was also investigating the Qualla Housing Authority, and Lambert stated that he believed this investigation led to the impeachment action. On May 25, 2017, the verdict of the
impeachment trial was delivered, with Lambert being found guilty of eight of the twelve
articles of impeachment and being removed from office. Vice Chief
Richard Sneed replaced Lambert immediately. Following Lambert's departure from office he promised to continue working for better government for the Cherokee, even if he did not hold office. ==Electoral history==