I will repeat and reinforce (and slightly qualify) my prediction from August 2007 that Barack Obama will lose the November 2012 election for President of the United States to the Republican candidate. I will make only one reservation: If the Republicans run Sarah Palin as the candidate or vice-presidential candidate, Obama will win. Furthermore, whether or not Palin runs and Obama wins or loses, the Republicans will have a majority at least in the House of Representatives in the 2012 elections.
It's possible the Republicans will run a candidate (such as Palin) that simply cannot beat Obama, but I think they went with their 2nd string in 2008. They'll see that Obama is as vulnerable as Carter was, go with their "Ronnie", their first string in 2012. They shouldn't run Palin, but they should give her a prominent role as a spokesmodel. She might even run in the primaries, but she should do so only to gain credibility.
We might even see a ????/Lieberman ticket, unless progressives are able to focus their voodoo powers and Joe drops dead of an aneurysm.