Actually more Californians voted for the Republican against her in the 2014 election for attorney general, than voted for Harris when she later ran for Senate in the special election.
Obama by contrast had won 3.6 million votes, in a smaller state, for a decisive 70% win in his Senate race.
Harris was a joke of a candidate who was obviously unelectable outside of a deep blue state, but she was forced on us so the DNC could virtue signal. It was a slap in the face to every qualified Democrat, many of whom would have had a chance to defeat Trump (a low bar if there ever was one).
Sources:
https://en.wikipedia.org/wiki/Electoral_history_of_Kamala_Ha...