As members of opposing political parties, we disagree on a number of important issues. But we must not allow honest disagreement over some issues to interfere with our ability to work together when we do agree.

By far the single most important of these is our current initiative to include substantial reductions in the projected level of American military spending as part of future deficit reduction efforts. For decades, the subject of military expenditures has been glaringly absent from public debate. Yet the Pentagon budget for 2010 is $693 billion -- more than all other discretionary spending programs combined. Even subtracting the cost of the wars in Iraq and Afghanistan, military spending still amounts to over 42% of total spending.

It is irrefutably clear to us that if we do not make substantial cuts in the projected levels of Pentagon spending, we will do substantial damage to our economy and dramatically reduce our quality of life.

We are not talking about cutting the money needed to supply American troops in the field. Once we send our men and women into battle, even in cases where we may have opposed going to war, we have an obligation to make sure that our servicemembers have everything they need. And we are not talking about cutting essential funds for combating terrorism; we must do everything possible to prevent any recurrence of the mass murder of Americans that took place on September 11, 2001.

Immediately after World War II, with much of the world devastated and the Soviet Union becoming increasingly aggressive, America took on the responsibility of protecting virtually every country that asked for it. Sixty-five years later, we continue to play that role long after there is any justification for it, and currently American military spending makes up approximately 44% of all such expenditures worldwide. The nations of Western Europe now collectively have greater resources at their command than we do, yet they continue to depend overwhelmingly on American taxpayers to provide for their defense. According to a recent article in the New York Times, "Europeans have boasted about their social model, with its generous vacations and early retirements, its national health care systems and extensive welfare benefits, contrasting it with the comparative harshness of American capitalism. Europeans have benefited from low military spending, protected by NATO and the American nuclear umbrella."