The major arguments against Amendment 36 in Colorado go along these lines:
1) Doing away with winner-takes-all will weaken Colorado's voice in presidential elections.
My take: What voice? Didn't know Colorado had a voice. The people of Colorado have many voices, and they aren't all Republican either. Amendment 36 will give Coloradans who have not had voices under the old rules to finally be heard in presidential elections.
2) Amendment 36 could be unconstitutional, thus throwing the 2004 election into the courts. It'll be more of a disaster than the 2000 election.
My take: I'm willing to take that chance. Those who will be pushing to throw this into court will be Republican operatives should the election go to Kerry in a manner where four EC votes could swing it to Bush. I don't think this is going to happen, and the risk of this will be clearer as Election Day comes closer.
I'm also willing to risk the uncertain period while this issue gets resolved. Even with its string of SNAFUs, the Bush administration should be able to carry on at least minimal governing business while the courts decide. The courts will make this issue priority to figure out who is our next president by January, 2005.
3) The Founding Fathers wanted the EC, therefore it's not wise to mess with tradition.
My take:

whaaaaa? Amendment 36 does not get rid of the EC. It only modifies how Colorado decides who gets the votes. It's a very simply mathematical procedure based on percentages. Even grade school children could figure it out.
But then maybe that's the real problem? Too simple?
4) This thing is funded by a

Californian!
My take: Oh, grow up. Like other Colorado initiatives haven't been funded from out of state. Is it only okay to do this if Republicans fund the intiatives? Or is this an appeal to emotions of those who don't want to Californicate Colorado? Whatever, the amendment will be on the ballot. Who funded it is irrelevant to the question.
5) This thing is only a Demo ploy to swing the election to Kerry!
My take: That's part of the motivation, I am sure. Still, I appreciate the opportunity to change how we distribute EC votes. This has been niggling me ever since I started voting, and it was one of those things in civics class way back in high school that bothered me. So it isn't all about this one election. It is about making every vote more meaningful, and that's good for this state and the country.
6) Hey, if these Demos were serious about changing the way votes get distributed, they'd push for a change nationwide!
My take: You're not really serious about that, are you? This change has to come state-by-state, not through US Constitutional amendement.
Of course, the Repubs are free to spend scads of money bringing about this change. If they wanted it, that is. Don't think they do, not at all. Here's the tradition that's hinted at but not spoken straight up:
Republicans are afraid of the masses. They don't trust the masses to vote right. Power needs to be centralized, and the EC serves to help centralize the power by discouraging the masses to vote. In other words, the top dog should never be elected by popular vote. It's just too, um, populace-like. Darn near socialism, by gosh!