You want to protect US citizens? Let's cut spending and/or increase taxes so we're actually paying for the services/goods the government provides us. And if we cut spending, don't even think of making your priorities for cuts be in education, veterans benefits and services, training, employment, and social services: Combined, they don't even make up 10% of our budget.
If you really want to cut spending, you're going to need to touch social security, medicare/medicaid, and the DoD + Department of Homeland Security, which, combined with the interest on the nation debt, account for more than two thirds of the federal budget.
Social Security and Medicare/Medicaid costs i nparticular have been outpacing economic growth for a while now. Simple changes for the three programs:
#1: Remove the social security wage base, making all income taxable for social security. As it currently stands, there are two brackets for social security: Income under the social security wage base (about $106,000 last year), and income over the social security wage base. The first bracket has a higher marginal rate than the second bracket. That means everyone who made more than $106,000 last year had a lower tax rate than everyone who made less than $106,000. If we removed the social security wage base and had a flat tax for social security, like medicare/medicaid, over 95% of the insolvency problems the social security fund is facing (due to the large population of the baby boomer generation) will be funded for. and unless you make more than $106,000 , it wouldn't affect your taxes at all.
#2: Health care reform: We already got this done: The cost curve should be significantly flatter over the next few decades, allowing for the economy to (hopefully) outpace health care costs in growth. Further reforms can be made (like single payer) to reduce costs even further.
#3: The US has, by far, military supremacy among all countries. And all but one or two of the next 15 or so largest powers are our allies. We could reduce the military budget by 33-50% without worry. And refocus our efforts on small operations against guerrila fighters rather than large scale military standoffs with nations (further reducing costs).
Furthermore, we can close some tax loopholes (~$200B in lost revenue per year, IIRC), let the bush tax cuts expire, and, yes, increase taxes, even if it were only to the levels under clinton or Reagan (~1-2% change for the average household iirc)
You're looking at trillions of dollars of savings here, and note that outside of refactoring and shrinking the military industrial complex, none of it involves reducing benefits or services to the people. It's almost all administrative changes.