As of 2016, it has been adopted by ten states and the District of Columbia, whose 165 combined electoral votes represent 30.7% of the total Electoral College vote, and 61.1% of the 270 votes needed for it to have
legal force.
All of them have been Democratic states, although the Compact passed in 2016 in Republican-controlled chambers in Arizona and New York.
Swing states have shown less willingness to join the Compact, although it has passed chambers in states such as Colorado, Maine, Michigan, Nevada and New Mexico.