Give divided government a chance.

• Author: Niskanen, William A.

For those of you with a partisan bent, I have some bad news. Our federal government may work better (well, less badly) when at least one house of Congress is controlled by the opposing party. Divided government is, curiously, less divisive. It's also cheaper. The basic reason for this is simple: When one party proposes drastic or foolish measures, the other party can obstruct them. The United States prospers most when excesses are curbed, and, if the numbers from the past 50 years are any indication, divided government is what curbs them.

Let's look at some statistics. From the dawn of the Cold War until today, we've had only two periods of what could be called fiscal restraint: The last six years of the Eisenhower administration, and the last six years of the Clinton administration, both intervals in which the opposition controlled Congress. Under Clinton, the average annual increase in spending was at about one percent, while, under Ike, it was negative. By contrast, our unified governments have gone on fiscal benders. Harry Truman, with the help of a Democratic Congress, sent the money flying, with spending increases of as high as 10 percent a year. Lyndon Johnson was almost as profligate. And today, unfortunately, George W. Bush, with a GOP majority, is the heir to their legacies. To put this in plain numbers, government spending has increased an average of only 1.73 percent annually during periods of divided government. This number more than triples, to 5.26 percent, for periods of unified government. (See accompanying table.) That's a hefty premium to pay for a bit of unity.

Equally striking is that these spending increases have generally found the same recipient: the Pentagon. It's not that unified governments love to purchase bombers, but, rather, that they tend to draw us into war. This may sound improbable at first, but consider this: In 200 years of U.S. history, every one of our conflicts involving more than a week of ground combat has been initiated by a unified government. Each of the four major American wars during the 20th century, for example--World War I, World War II, the Korean War, and the Vietnam War--was initiated by a Democratic president with the support of a Democratic Congress. The current war in Iraq, initiated by a Republican...