The Trans-Pacific Partnership, or Trans-Pacific Partnership Agreement, was a highly contested proposed trade agreement between 12 Pacific Rim economies, Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, Vietnam, and the United States. After taking office, the then elected President Donald Trump formally withdrew the United States from TPP in January 2017. The TPP could not be ratified as required and had then not been entered into force.