That 29% are the dead enders.
You're talking about the same people who aren't sure Trump talked about Biden to the president of Ukraine.
https://thehill.com/homenews/admini...40-percent-of-republicans-say-trump-mentioned
Just 4 in 10 Republicans say they think President Trump discussed an investigation into Democratic presidential rival Joe Biden during a phone call with Ukraine's president, despite Trump acknowledging having done so, according to a new Monmouth University poll.
The survey, which was released Tuesday, found that 40 percent of Republican respondents said Trump "probably did" raise the idea of an investigation into Biden and Biden's son over unsubstantiated allegations of corruption during a July 25 conversation with Ukrainian President Volodymyr Zelensky. Meanwhile, 29 percent of Republicans said Trump "probably did not" mention an investigation into Biden.