https://www.cnn.com/2024/03/08/politics ... index.html
The CNN poll was conducted by text message with 529 US adults who said they watched the State of the Union on Thursday, and are representative of the views of speech-watchers only. Respondents were recruited to participate before the speech, and were selected by a survey of members of the SSRS Opinion Panel, a nationally representative panel recruited using probability-based sampling techniques. Results for the full sample of speech-watchers have a margin of sampling error of plus or minus 5.6 percentage points.