The wisdom of Cokie Roberts, from ABCnews.com ...

"It's been difficult to govern, really, since 2000," says ABC News' Cokie Roberts, a long-time observer of Congress. "The country has been split down the middle and the Congress has been split down the middle. There's no reason to believe that that will really change after Tuesday unless there's a huge Democratic wave."

This is really classic stuff. 'Difficult to govern.' That is, during a period of six years of unified Republican rule in Washington and unprecedented levels of party discipline in the Republican caucuses in both houses of Congress.

Late Update: As TPM Reader ME rightly points out, the six year period in unified does include the 18 months of Democratic control of the senate from mid-2001 through the 2002 election.