The charts above are from the Pew Research Center. They questioned 10,093 respondents between September 8th and 13th, and their survey has a 1.6 point margin of error.
It shows that a clear majority of Americans don't want political ads on their social media sites. In fact, only 26% believes those sites should run political ads while 54% believe they should not. And that extends across all age groups, party labels, and political ideologies.
They also don't like those social media sites using their data and online activity to target them for political ads.