<Li> The executive can veto legislative acts and, in turn, a supermajority of lawmakers may override the veto . The veto is generally derived from the British tradition of royal assent in which an act of parliament can only be enacted with the assent of the monarch . </Li> <Li> The president has a fixed term of office . Elections are held at regular times and cannot be triggered by a vote of confidence or other parliamentary procedures, although in some countries there is an exception which provides for the removal of a president who is found to have broken a law . </Li> <Li> The executive branch is unipersonal . Members of the cabinet serve at the pleasure of the president and must carry out the policies of the executive and legislative branches . Cabinet ministers or executive departmental chiefs are not members of the legislature . However, presidential systems often need legislative approval of executive nominations to the cabinet, judiciary, and various lower governmental posts . A president generally can direct members of the cabinet, military, or any officer or employee of the executive branch, but cannot direct or dismiss judges . </Li> <Li> The president can often pardon or commute sentences of convicted criminals . </Li>

The members of cabinet under president system are accountable to whom