To the great disappointment of many small business owners and supporters of federalism, the Supreme Court’s recent decision in Wayfair vs. South Dakota opened the door for states to impose an internet sales tax, even on businesses that have no physical presence in their borders. Because Congress has the constitutional authority to regulate interstate commerce, it is now considering ways to address this newfound taxing authority. Congress must take this opportunity to use its power to protect small businesses from these taxes and perhaps to at least work to slow the process down while a long term solution is explored. The strength of the American economy depends on it.