Grants, Mandates, and Fiscal Federalism

The Constitution never lets Congress order a state to pass a specific law, so Congress buys compliance instead. A categorical grant hands a state money for a narrow purpose with detailed conditions attached: build this highway, run this nutrition program, report back this way. A block grant hands a state money for a broad purpose, like community development or welfare, and lets state officials decide how to spend it within that area. Both are cash transfers, but the strings attached are totally different: categorical grants come with a checklist, block grants come with general goals.

Congress can also attach a condition to a grant that has nothing to do with the grant's actual purpose, which is how federal highway money forced a drinking age change. In South Dakota v. Dole (1987), the Supreme Court upheld Congress withholding a percentage of highway funds from states that refused to raise their drinking age to 21, even though drinking age has nothing to do with road construction. Every state fell in line rather than lose the cash, which shows how powerful conditional spending can be without Congress passing a single drinking law itself.

An unfunded mandate skips the bribe entirely. Congress or federal regulators simply require states or localities to do something, like meet an environmental standard or an accessibility requirement, without sending money to cover it. States resent these because they shift costs downward while keeping the directive top-down, which is why Congress eventually passed the Unfunded Mandates Reform Act of 1995 to require more disclosure of these costs before imposing them.