In which of the following sentences does "power" mean "leader"?

In the sentence "The gang boss is the real power in that community.", the word "power" is used as a noun meaning "leader." The sentence "Those solar panels have the capacity to power over a hundred homes." uses the word as a verb meaning "energize." The sentence "Use the boat's engines to power through the ice." uses the word as a verb meaning "push." The sentence "Many would-be politicians are tempted by power." uses the word as a noun meaning "influence."