Sometimes things have to get worse before they get better. This, however, drastically relies on that notion being true. A backfire would be catastrophic.
If the jackal is breaking your windows you'll probably do something direct and immediate to defend yourself. If it's slinking just beyond the tree line you might decide to put another log on the fire and sip hot chocolate.
I think there's a somewhat decent argument to be made here. I consider Obama to be governing as a somewhat center-right politician, and although I know that's not universally accepted, I think if you look at his policies objectively, it's at least a fairly plausible statement. However, there are right wing factions that have, from the start, been fairly fanatically opposed to Obama (race might play some role, but given the political history of the last 10 years, I would not be surprised if the right would have reacted similarly to almost ANY democratic president). This fanatical opposition led to the rise of the Tea Party, which has moved the Republican party even further right and solidified the congressional republican strategy of opposition at any cost - clearly counter-productive to getting anything done.
Now, in my view, this radical far-right constituency would not have been nearly as vocal if a president such as McCain was in office. That's not to say that they wouldn't be there, but I don't think they would have nearly as prominent of a place in the Republican party, and I don't think that the Tea Party would exist at all. When a party is responsible for governing, it's hard for it to go too far off the deep end (I hope). Even far right Republicans would have had trouble vilifying a center-right Republican president, which is how I believe McCain would have governed. With a bit less opposition, such a president could and perhaps would have governed in a similar way as Obama has, but would have faced far less obstructionism. I'm not saying that McCain would have been a better president than Obama - I think the opposite is true, and Sarah Palin flat-out scares me. Instead, I just think that congressional Republicans have dug in their heels so far that even a Democrat who agrees with them on most fundamental issues is seen as a closet socialist Muslim out to destroy the US as we know it. With that kind of view and a minimum of 60 votes to pass anything in the Senate, it's hard to see how a moderate or even slightly right Democrat could govern successfully.
That being said, this year's crop of GOP candidates is pretty scary, and I don't know how well this logic applies. I think a figure like John Huntsman might be able to successfully tame the far right wing of his party while governing from a fairly centrist position, but he may be the only one. Romney is hard to get a read on - if he's just moved to the right rhetorically to get through the primaries, then he might govern in a reasonable manner. However, if he truly believes some of the things that he has said this summer/fall, or has boxed himself in too much with campaign promises, his presidency could be fairly catastrophic. In my view, the only "productive" reason to vote for the "greater" of two evils is if you think that the two candidates would in reality govern quite similarly but one would be unable to get anything done due to extreme obstructionism. If the two candidates would govern very differently, then it seems highly counter-productive to vote for what you see as the greater of two evils.
Well, I believe that if the republicans loose again, they will have to readjust their positions anyway. But as you said about Romney, this is the primaries and they are try to find the center of the constituents who will vote in those primaries. So judging them right now is not a very good barometer.
I would like to think that, but everyone said that there would be a moderating readjustment on the part of the Republicans after 2008 too...
Understand that I'm making this a bit as a devil's advocate argument - I will still almost certainly be voting for Obama in 2012 (the only republican I could even consider voting for would be Huntsman, based solely on their acceptance of science). But I was responding to the question of how it could be at all productive to vote against the "lesser of two evils" in such a choice. I think there is a valid devil's advocate argument that in the face of such unmitigated obstructionism, the government as a whole might be more productive with a moderate republican in office than a democrat acting like a moderate republican (like we have now). I'm NOT saying that I approve of that situation, or that it's a good situation, I just think that it's one way to look at the situation we're in. Not sure why that view got down-voted...
Change will likely not happen within the current electoral system. Don't get forced into a "lesser of two evils" choice. Think outside the box. Think outside your current broken political system.