A focus group conducted by Republican pollster Frank Luntz consistently agreed that Donald Trump delivered better answers on a host of issues during Sunday's presidential debate and outperformed his Democratic opponent overall.

Luntz hosted a group of 30 undecided voters at the debate in St. Louis, Missouri, where Trump and Hillary Clinton faced off for a highly-anticipated debate in which both were forced to respond to the latest scandals plaguing their campaigns.

Many of the undecided voters were turned off when Trump brought up Bill Clinton's sexual indiscretions, but the Republican nominee's sharp criticism of Hillary Clinton's private email practices and his case against Obamacare earned him immediate praise.

When participants were asked to choose who had delivered a better performance halfway through the 90-minute debate, 17 of the voters chose Trump while only four chose Clinton. Nine more participants said the two candidates were running about even in their responses and overall performance.

Trump's highest moment during the first half the debate was when he vowed to appoint a special prosecutor to investigate Clinton if he is elected president, and told the former secretary of state she should be "ashamed of herself" for misleading the American public on the email issue.

"I think what you should be apologizing for are the 33,000 emails that you deleted and that you acid-washed and then the two boxes of emails and other things that were taken from an office ... and now are missing," Trump had said to Clinton.

Voters were impressed by Trump's responses when the billionaire was asked about Obamacare and they felt his apology for the lewd language he used in leaked audio tapes from 2005 was sincere. More participants were concerned with Clinton's email practices than they were with the audio tapes that have caused numerous Republican lawmakers to rescind their endorsement of Trump.

Trump's tape is bad for him, but Hillary's emails are even worse for her. #debate — Frank Luntz (@FrankLuntz) October 10, 2016



By the end of the debate, more participants (21) told Luntz that Trump's performance had a positive impact on their voting choice going forward than did those who were impressed by Clinton's performance (9). Another participant said it was obvious that Trump had done more to prepare for the second debate than he did for the first.

Focus group member: "It's clear that Trump practiced."#Debate2016 — Frank Luntz (@FrankLuntz) October 10, 2016



Trump, who began with nine voters in his camp, had doubled his support when participants were asked at the debate's conclusion who they plan to vote for. Meanwhile, Clinton had lost four participants after beginning with eight supporters.