True, Mr. McConnell did say that he might be willing to work with Mr. Obama in certain circumstances  namely, if he’s willing to do a “Clintonian back flip,” taking positions that would find more support among Republicans than in his own party. Of course, this would actually hurt Mr. Obama’s chances of re-election  but that’s the point.

We might add that should any Republicans in Congress find themselves considering the possibility of acting in a statesmanlike, bipartisan manner, they’ll surely reconsider after looking over their shoulder at the Tea Party-types, who will jump on them if they show any signs of being reasonable. The role of the Tea Party is one reason smart observers expect another government shutdown, probably as early as next spring.

Beyond the politics, the crucial difference between the 1990s and now is the state of the economy.

When Republicans took control of Congress in 1994, the U.S. economy had strong fundamentals. Household debt was much lower than it is today. Business investment was surging, in large part thanks to the new opportunities created by information technology  opportunities that were much broader than the follies of the dot-com bubble.

In this favorable environment, economic management was mainly a matter of putting the brakes on the boom, so as to keep the economy from overheating and head off potential inflation. And this was a job the Federal Reserve could do on its own by raising interest rates, without any help from Congress.

Today’s situation is completely different. The economy, weighed down by the debt that households ran up during the Bush-era bubble, is in dire straits; deflation, not inflation, is the clear and present danger. And it’s not at all clear that the Fed has the tools to head off this danger. Right now we very much need active policies on the part of the federal government to get us out of our economic trap.

But we won’t get those policies if Republicans control the House. In fact, if they get their way, we’ll get the worst of both worlds: They’ll refuse to do anything to boost the economy now, claiming to be worried about the deficit, while simultaneously increasing long-run deficits with irresponsible tax cuts  cuts they have already announced won’t have to be offset with spending cuts.

So if the elections go as expected next week, here’s my advice: Be afraid. Be very afraid.