“The states have devised mechanisms to ensure that the electors they appoint vote for the presidential candidate their citizens have preferred. With two partial exceptions, every state appoints a slate of electors selected by the political party whose candidate has won the state’s popular vote. Most states also compel electors to pledge in advance to support the nominee of that party. This court upheld such a pledge requirement decades ago, rejecting the argument that the Constitution ‘demands absolute freedom for the elector to vote his own choice.'””Today, we consider whether a state may also penalize an elector for breaking his pledge and voting for someone other than the presidential candidate who won his state’s popular vote. We hold that a state may do so.”The opinion came down in the Washington state case – and the Colorado case was decided based on that precedent.