Although you can use your checking account as a reserve account for your cash, much like a savings account, it may not be the best option for that purpose. Most checking accounts do not earn interest, and even those that do typically earn less than a savings account at the same financial institution.
As is the case with other forms of government in American political theory, local governments derive their power from the people; in practice, local governments receive their authorization from their respective states.
Article 1 of the United States Constitution grants Congress its powers. It is primarily intended to be a legislative body of a three-branch system that shares equal power. Congress is the only branch of government that can make or change laws. The executive branch of the government is led by the President, while the Supreme Court is at the top of the judicial branch of government. To form a system of checks and balances, it is necessary for Congress to have some non-legislative powers. These powers help the government organize in the event that one branch attempts to exercise too much influence over the others.