SACRAMENTO, Calif. — Organizers of the recall effort against California Gov. Gavin Newsom have collected enough valid signatures to qualify for the ballot, state election officials said, likely triggering just the second such election in state history.

“The people of California have done what the politicians thought would be impossible,” said Orrin Heatlie, the retired county sheriff’s sergeant who launched the recall effort. The California secretary of state’s office said that more than 1.6 million signatures had been deemed valid as of Monday, about 100,000 more than required.