JERUSALEM — As Prime Minister Benjamin Netanyahu fought back Wednesday against a police finding that he had accepted nearly $300,000 in bribes, his cool self-confidence betrayed not the slightest worry that he could be forced to step down anytime soon.

“The coalition is stable, and no one, me or anyone else, has plans to go to elections,” he declared in Tel Aviv. “We will continue to work together with you for the citizens of the State of Israel, until the end of our term,” in late 2019.

If Mr. Netanyahu had entered a dangerous new period in which he must battle for his political survival and avoid imprisonment, he did so possessed of political advantages that no Israeli prime minister has before enjoyed.

Beloved by his base and respected even by his adversaries as a guardian of Israel’s security, Mr. Netanyahu remains the dominant figure on the Israeli stage, his combined 12 years as prime minister closing in on the record of David Ben-Gurion, Israel’s principal founder.