Sciatica can also be caused by tumors impinging on the spinal cord or the nerve roots. Severe back pain extending to the hips and feet, loss of bladder or bowel control, or muscle weakness may result from spinal tumors or cauda equina syndrome. Trauma to the spine, such as from a car accident, may also lead to sciatica.
Republicanism is an ideology centered on citizenship in a state organized as a republic under which the people hold popular sovereignty. [citation needed] Many countries are republics in the sense that they are not monarchies. This article covers only the ideology of republicanism.
Federalism is a system based upon democratic rules and institutions in which the power to govern is shared between national and provincial/state governments, creating what is often called a federation. The term federalist describes several political beliefs around the world. Also, it may refer to the concept of parties; its members or supporters called themselves Federalists. In a federal system where sovereignty is divided between a central governing authority and constituent political units, power is also divided.