presidential systemA form of government in which the executive branch is elected separately from the legislative. The chief executive, the president, is elected for a fixed term and cannot be removed except by extraordinary measures. The powers vested in the President are usually balanced against those vested in the legislature. In the American presidential system, the legislature must debate and pass various bills. The President has the power to veto the bill, preventing its adoption. However, the legislature may override the Presidentís veto if they can muster enough votes.