Colorado's governor has signed into law a bill to have the state join others in casting their presidential electoral votes for the winner of the national popular vote.
Gov. Jared Polis signed the bill late Friday. He'd long said he supported the measure.
Colorado joins 11 other states and the District of Columbia in what's called the National Popular Vote Interstate Compact.
The pact would take effect after states with a collective 270 electoral votes -- the number needed to win the presidency -- agree to join.
With Colorado's nine electoral votes, compact members have 181.
Opponents say the initiative subverts an electoral college that ensures that smaller states aren't trampled when it comes to choosing a president.
