Prime Minister of Barbados
Stuart served as acting prime minister of Barbados from May 2010 when Prime Minister David Thompson became ill with pancreatic cancer. Adriel Brathwaite succeeded Stuart in the positions he then held, namely attorney-general and minister of home affairs. Thompson died on 23 October 2010. Leaders of the Democratic Labour Party held an emergency meeting at the party's headquarters in George Street in Bridgetown on the morning of Thompson's death, during which Stuart was chosen as the next prime minister.
Stuart was sworn in as the 7th Prime Minister of Barbados and Minister for National Security, the public service and Urban Development the same day by Governor-General Clifford Husbands.
In 2011, Stuart was appointed a member of the UN Global Panel on Sustainability.
Stuart won his first election as prime minister on 21 February 2013, defeating Barbados Labour Party challenger (for his constituency) Noel Lynch.
On 24 January 2014 Stuart became a member of the Privy Council of the United Kingdom.
Stuart had announced changes for Barbados including his intention to turn Barbados into a republic and replace the Queen of Barbados with a ceremonial president as head of state. Ahead of the 2018 General Election Stuart stated if re-elected he would push for removal of Barbados from jurisdiction of the Caribbean Court of Justice (CCJ).
The DLP lost all of its seats in the May 2018 election to the Barbados Labour Party of Mia Mottley. It was the worst defeat of a sitting government in Barbadian history. Stuart himself was roundly defeated in his own seat, taking only 26.7 percent of the vote.
On 1 August 2018, Stuart stepped down as DLP leader and President, and a leadership election was held to fill the position where the Candidate for Christ Church South Verla De Peiza won unopposed in the election. Verla De Peiza succeeded Stuart on the following day.