Advocates of interstate competition and choice in health insurance contend that state-level mandates for particular benefits, providers, and types of coverage, as well as other regulations, distort prices, increase health care costs, and reduce access to affordable insurance. Several members of Congress and at least one presidential candidate have proposed...

On November 5, the U.S. Supreme Court is scheduled to hear oral arguments in Davis v. Kentucky Department of Revenue—a lawsuit that threatens the continued existence of hundreds of single-state municipal bond funds, each of which holds a particular state’s bonds and caters to that state’s residents. The Supreme Court...

If the individual mandate is upheld, Americans will have suffered a loss of liberty from which there will be no turning back.

Two years after its enactment, ObamaCare remains unpopular, unaffordable and unworkable. This week, three days of oral argument before the Supreme Court should confirm that it’s also unconstitutional.

There remains a long line of unfortunate and flawed Supreme Court precedents regarding the broad scope of the powers granted to Congress under both the Commerce Clause and the Necessary and Proper Clause.

A critique of a court decision striking down Colorado's law to collect use tax from out-of-state sellers.

The selective income taxexemption for home-state municipal bonds at issue in Davis v. Kentucky Department of Revenue is a barrier to interstate commerce.