Karl Rove, writing in today's Wall Street Journal:
This will be a very difficult year for Republicans. The economy's shaky state, an unpopular war, and the natural desire for partisan change after eight years of one party in the White House have helped tilt the balance to the Democrats.
Gee, Karl, any other factors you're leaving out here? Republican scandals and incompetence? The most unpopular president in the history of polling?
--Jonathan Chait