In the United States v. Miller case of 1911, the Supreme Court ruled on a dispute involving an income tax evasion charge against John W. Miller. The government accused Miller of failing to pay taxes on his earnings from selling timberland in Louisiana and Mississippi between 1903 and 1905. However, he argued that these transactions were not taxable because they constituted sales of real estate rather than income-generating activities under the law at that time. The court sided with the government's interpretation, ruling that profits derived from such sales could indeed be considered as part of one's gross income for taxation purposes under existing laws (the Revenue Act). This decision upheld a broader definition of "income" which included gains or profits obtained through transactions involving property rights or interests. This case is significant because it set a precedent for how capital gains are treated in terms of federal taxation - specifically, it established that profit made from selling real estate can be taxed as income.

In the dissenting opinion for United States v. Miller, Justice Harlan disagreed with the majority's interpretation of the Commerce Clause and its application to this case. He argued that Congress had overstepped its bounds by regulating purely local activities under the guise of interstate commerce regulation. In his view, if a transaction was not directly related to interstate commerce, it should be beyond federal jurisdiction and left to state law instead. This included transactions like those in question in this case - insurance policies sold within one state but backed by out-of-state companies or assets. Harlan believed that allowing such broad interpretations would give Congress virtually unlimited power over all economic activity, undermining states' rights and upsetting the balance of federalism established by Constitution framers.