McCain vs Obama: Checks and Balances

From Robert Samuelson:

McCain does have one provisional and accidental advantage. By most appraisals, the Republicans will get slaughtered in congressional elections, and I have a visceral dislike of one-party government. It didn't work well under Bill Clinton or George W. Bush. Divided government doesn't ensure good government, but it may limit bad government by checking the worst instincts of both parties.