California Gov. Gavin Newsom has endorsed his friend and home-state colleague Sen. Kamala Harris for president.

“I'm very enthusiastic about Kamala Harris. I’ll be endorsing her candidacy for president,” he said. The move confirms that Newsom, 51, whose own presidential ambitions are no secret, will not jump into the 2020 race.

“I’ve known her for decades, not only as district attorney where she did an extraordinary job with a very progressive record, but I watched her up close as lieutenant governor, when she served as attorney general, and I have the privilege of working with her as a U.S. senator," he told MSNBC. "I think the American people could not do better.”

Harris, 54, a former California attorney general, has already secured endorsements from other prominent political figures in California, including Rep. Barbara Lee, a former chair of the Congressional Black Caucus, and labor and civil rights leader Dolores Huerta.

Newsom, who was once married to Kimberly Guilfoyle, Donald Trump Jr's girlfriend, has long been considered a possible candidate for the 2020 presidential race, but he denied last month that he would launch a campaign. “God no,” he said. “No, no — no, that’s crazy.”