Joel Connelly reminds Democrats not to get too comfortable at the top:

Bill Clinton was going to the White House, eight Democrats from Washington were headed to the U.S. House of Representatives, while local pundits were bound for KCTS-TV and a panel: "Does the Republican Party have a future?"

By 1994, two Novembers later, six of those eight House Democrats had lost their seats, along with more than two dozen colleagues from the state House of Representatives.

The state Democratic Party held a holiday dinner honoring defeated House Speaker Tom Foley. The turnout -- including ringers admitted free -- 37 people.

Political winds change direction quickly. A sweeping victory is often followed by the winner's excess. The voters then administer a spanking. Experts' talk of a "watershed" election is washed away in the next cycle.

Republicans could have used similar advice after 2004 - obviously.