SACRAMENTO, Calif. (AP) — The new Democratic governor in the nation’s most populous state is ruling out a challenge to President Donald Trump.

California Gov. Gavin Newsom has had frequent Twitter wars with the Republican president and recently ran political ads in several eastern swing states.

READ MORE: Grand Jury Indicts San Joaquin County Correctional Officer On Sexual Assault Charges

But he said “God no” when asked directly Thursday if he’s considering a run for president, calling the idea “crazy.”

READ MORE: Sheriff: 1 Dead After Plane Crash Along Shore Of Clear Lake

Newsom, who took office earlier this month, hinted that he’s likely to endorse U.S. Sen. Kamala Harris, saying the California Democrat is a longtime friend for whom he has enormous respect. Harris announced Monday that she is joining a crowded field of Trump challengers.

MORE NEWS: 15-Year-Old Suspected Of Pointing Gun At Other Student During Fight In Marysville High Bathroom

Newsom raised speculation that he might seek the presidency by running Facebook ads opposing Trump’s southern border wall and supporting universal health care.