The vice president must be ready at a moment’s notice to assume the presidency if the commander in chief is unable to perform their duties. Vice presidents can play a relatively active role on the National Security Council (NSC), serving as a general advisor and freely advocating their own positions during meetings. In particular, the president may ask the vice president to serve as an independent voice, untethered to any of the agencies represented by other NSC participants. The president may also ask about the interaction between the issue at hand and the domestic political situation, including in Congress.

The vice president’s goals are to

- provide advice to the president on any topic, including those overlooked by other NSC participants; and
- understand the range of views in Congress and work to build congressional and public support for the president’s chosen approach.