Kamala Harris was declared the winner of Wednesday night's poll by respondents to a CNN Instant Poll, while a focus group convened by Republican pollster Frank Luntz took issue with her 'abrasive' and 'condescending' manner.
Following a 90-minute debate which was largely civilized and thoughtful - unlike last week's presidential debate - 609 voters were asked by telephone for their views, in the CNN-run survey.
Almost six in 10 (59 per cent) said Harris won, while 38 per cent said Vice President Mike Pence had the better night.
The percentage is roughly equal to predictions made by the same voters, ahead of the Salt Lake City showdown.
Harris and Pence, separated by plexiglass, debated the issues on Wednesday night in Utah
Harris, a 55-year-old California senator, found the debate helped her favorability ratings. They rose from 56 per cent before the debate to 63 per cent after.
For the 61-year-old vice president, his remained the same, with 41 per cent approving of him before and after.
The pair had around the same number of people saying they were qualified to be president, were Trump or Biden to become incapacitated: 65 per cent for Pence, and 63 per cent for Harris.
The CNN post-debate poll was conducted by SSRS by telephone.
Over on Fox News, however, Republican pollster Frank Luntz was delivering quite a different verdict.
Luntz, who has conducted televised focus groups for major news outlets since 1996, was asked by the Los Angeles Times to gather a group of undecided voters via Zoom.
Frank Luntz's poll was conducted via Zoom
Harris saw her favorability rise in the CNN Instant Poll, but Luntz's group was more critical
Pence, the former