Example #2: Six years ago Karl Rove made it an article of faith that the way to win modern presidential elections was to appeal to your base. After the 2004 election, in which an army of motivated evangelicals provided George Bush's margin of victory, this became conventional wisdom on both sides of aisle and throughout the blogosphere. But after today's primary it seems likely that the frontrunners in both parties will be men who are deliberately appealing to independents. In other words, the old wisdom is holding: a vote from your base is just one vote, but a vote from the center is two votes the one you get and the one you deny your opponent.
Example #3: Actually, I don't have a third example. But you're always supposed to for these kinds of things. It's not a trend unless you produce three examples. Anybody got one?