Political capital is a metaphor for usable influence generated by approval, election results, reputation, party ties, policy expertise, and expectations of future cooperation. It is not a bank account with a fixed balance. A president may possess leverage on national security but little on taxes, or may be popular nationally but weak in the particular states represented by pivotal senators. A claimed electoral mandate is evidence used in bargaining, not a new constitutional power.

Suppose a president has 65 percent national approval but only 35 percent approval in the states of three undecided senators. A public appeal may raise attention without changing those senators' incentives, especially if they face competitive primaries. The same president might have more leverage over House members from supportive districts. The relevant distribution and intensity of opinion matter more than the national number alone.

Keep measurement, mechanism, and outcome separate. A poll estimates approval; political capital describes possible leverage; bargaining is the strategy; a vote is the result. Do not assume high approval guarantees passage, and do not infer that a failed bill proves the president lacked formal authority such as a veto.

Video lesson: How Presidents Govern: Crash Course Government and Politics #14