From Paul Krugman's new blog, Conscience of a Liberal:
It's just one election, and may not represent a trend (although I think it does.) But the 2006 election was, in fact, a progressive landslide.
That's from the second post, The Straight and Not Narrow, in which Krugman dispells the myth that the Democratic victory in 2006 was only barely eked out. In fact, it was a bigger landslide than the unfortunate Republican takeover in 1994.