In 2006 the Moroccan Royal Advisory Council for Saharan Affairs (CORCAS) proposed a plan for the autonomy of Western Sahara and made visits to a number of countries to explain the proposal. The Spanish approach to regional autonomy has been named as a possible model for Western Saharan autonomy, mentioning specifically the cases of the Canary Islands, the Basque Country, Andalusia or Catalonia. The plan was presented to the UN Security Council in April 2007, and has received the backing of the USA and France.
In a 2007 letter to President Bush, 173 members of US congress endorsed the plan. In a letter to President Obama in 2009, 233 US congress endorsed the plan. In 2010, a letter to Secretary of State Clinton, backing the Moroccan plan for autonomy, was signed by 54 Senators.