I'm not in Colorado but I have heard that there is actually some opposition from both Republicans and Democrats on this. The reason being that with 9 electoral votes and a split of them, and assuming each candidate in any election would take 3 of the votes that only leaves 3 electoral votes in play. In order not to split 5-4, it would be necessary for a candidate to get 67%+ of the vote. How likely is that? In reality, only one electoral vote would be in play.