Neo-conism has already destroyed the republican party. It's just a matter of time before it completely dies off and cannot compete. They have no legs to stand on. Capitalism in general is starting to fall apart. Look at all the banks & mortgage companies being bailed out. The repugs are just as socialistic as that democrats, they're just worse at it.
The US will become more socialist while hopefully less interventionist abroad. People will see the need for energy independence & environmental regulation (though probably too late). The individualistic, consumptive, greed-driven way of life will crash like the stock market in 1929 or Rush Limbagh's poor (yet rich) sad ass keeling over of a heart attack and people will be forced to change. There's no way the republican party will survive. By 2012, they'll end up with less support than Ron Paul. I voted "something else" though because it isn't likely the Democrats will be overly loved either. Alot of the unsustainability of the modern industrial world will begin to show (it's been subtlety showing for 50 years or so but America doesn't "do" subtle much anymore) and many of the entitlements people take for granted will start to disappear & people will be angry & Obama will take much of the blame. The two-party system cannot survive the economic collapse that will occur within the next couple of decades.