Reuters and the market research firm Ipsos found that 53 percent of voters who had at least some knowledge of the debate felt that Harris won. Just 24 percent said the same of Trump.

A CNN flash poll released shortly after the debate also showed a majority of viewers felt Harris outperformed Trump, and a YouGov poll showed 54 percent of those surveyed said Harris won compared with 31 percent for Trump.

Fifty-four percent felt one debate was enough. Meanwhile, 46 percent said they wanted a second debate.

Trump says there will be no more debates after first Harris face-off