If driving from one state to another, especially for business purposes, doesn't count as interstate commerce I don't know what does.
See the United States Constitution (Article I, Section 8, Clause 3): The United States Congress shall have power "to regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes."
See the United States Constitution (Article I, Section 8, Clause 3): The United States Congress shall have power "to regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes."