veto power, n.All

Veto power (n.) over ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠rivals comes from controlling their energy: Kennan saw that holding Japan's oil supply would give the US a veto over its policy.