Forty-six per cent of Californians approve of the job 52-year-old Harris is doing, while 23 per cent disapprove, Politico news reported, citing the poll released yesterday by the nonpartisan Public Policy Institute of California (PPIC).
Harris, whose mother was from Chennai and father from Jamaica, won the US Senate Seat from California in a landslide election on November 8, becoming the first black and Asian Senator from the state.
Thirty per cent of Californians, including 20 per cent of Democrats, said they do not know how to rate Harris' performance, according to the poll.
Feinstein, who has served in the Senate for 25 years and is expected to seek re-election in 2018, saw the former California attorney general's job approval rating among California adults fall seven percentage points from early last year, to 49 per cent, the report said.
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Thirty-two per cent of Californians disapprove of the job she is doing, it said.
A media report in November said that she has the potential to become the first woman president of the US.
The poll, using live telephone interviews, was conducted from March 5 to 14, surveying 1,706 California adults. The margin of error is plus or minus 3.3 percentage points.