As Glenn Reynolds notes, here it is, four years later, and Obama is still running against Sarah Palin.
There's only one problem: She's not running for office. Seems like a waste of time, money, and effort, but then they've really got nothing else. They certainly don't want to run on Obama's record.
During the 2008 campaign the Democrats kept making comparisons between Obama and Palin, trying to paint her as not capable of being vice president while at the same time claiming Obama was eminently qualified to be president. They almost totally ignored McCain. I always thought that was strange, the Democrats comparing the GOP vice presidential candidate to their presidential candidate. Could it be that even then they were scared of her? Four years later and they still go after her and her family, putting them under the kind of scrutiny Obama and his family would never survive.