State governments in the United States are those governments formed in each U.S. state.
The governments of the 13 colonies which formed the original union under the United States Constitution trace their history back to the royal charters which established them during the year of colonialism. Most other states were organized as federal territories before forming their governments and requesting admittance into the union.
Under the Tenth Amendment to the United States Constitution, all powers not granted to the federal government are reserved for the states and the people. All state governments are modeled after the federal government and consist of three branches: executive, legislative and judicial. The U.S. Constitution mandates that all states uphold a "republican form" of government, although the three-branch structure is not required.
In every state, the executive branch is headed by a governor who is directly elected by the people. In most states, the other leaders in the executive branch are also directly elected, including the lieutenant governor, the attorney general, the secretary of state and auditors and commissioners. States reserve the right to organize in any way, so they often vary greatly with regard to executive structure. No two state executive organizations are identical.
All 50 states have legislatures made up of elected representatives, who consider matters brought forth by the governor or introduced by its members to create legislation that becomes law. The legislature also approves a state's budget and initiates tax legislation and articles of impeachment. The latter is part of a system of checks and balances among the three branches of government that mirrors the federal system and prevents any branch from abusing its power.
Except for one state, Nebraska, all states have a bicameral legislature made up of two chambers: a smaller upper house and a larger lower house. Together the two chambers make state laws and fulfill other governing responsibilities. (Nebraska is the lone state that has just one chamber in its legislature.) The smaller upper chamber is always called the Senate, and its members generally serve longer terms, usually four years. The larger lower chamber is most often called the House of Representatives, but some states call it the Assembly or the House of Delegates. Its members usually serve shorter terms, often two years.
State judicial branches are usually led by the state supreme court, which hears appeals from lower-level state courts. Court structures and judicial appointments/elections are determined either by legislation or the state constitution. The Supreme Court focuses on correcting errors made in lower courts and therefore holds no trials. Rulings made in state supreme courts are normally binding; however, when questions are raised regarding consistency with the U.S. Constitution, matters may be appealed directly to the United States Supreme Court.