09/27/19 08:00 AM—UPDATED 09/27/19 10:53 AM
By Steve Benen

... for months, no national poll showed proponents of presidential impeachment outnumbering opponents. Yesterday, that changed.

... in April, the same NPR/PBS NewsHour/Marist poll asked about Trump’s impeachment and found that opponents easily outnumbered supporters, 53% to 39% ...

http://www.msnbc.com/rachel-maddow-show/why-polls-show-public-attitudes-trump-impeachment-changing

SEP. 27, 2019, AT 6:00 AM
By Dhrumil Mehta

... according to the initial polls at least, public opinion doesn’t seem to have shifted dramatically from where it was following both the release of special counsel Robert Mueller’s report on April 18 and Mueller’s testimony before Congress on July 24. The majority of Americans still do not favor impeachment ... There are several reasons, however, to believe that this picture is incomplete and could change.

... although support for impeaching the president is shy of a majority, polling suggests that a majority of Americans do disapprove of Trump’s actions. A YouGov/Economist poll released Wednesday found that 52 percent of Americans said it is inappropriate for the president to request a foreign government open an investigation into a potential political opponent ... And in that same poll, 62 percent of Americans said that it is inappropriate for the president to threaten withholding foreign aid to a country if it refuses to “take an action which personally benefits the President” ...

... A separate YouGov poll conducted Tuesday found that a majority of Americans may either “strongly” or “somewhat” support impeachment if Trump “suspended military aid to Ukraine in order to incentivize the country’s officials to investigate his political rival” ...

... According to a Marist poll conducted Wednesday, 32 percent of Americans said they weren’t closely following news about the impeachment inquiry. And according to the YouGov/HuffPost poll, when asked if they found the allegation that Trump asked Ukraine to investigate Biden’s son credible, 42 percent of respondents said that they weren’t sure or hadn’t heard enough to say ...

https://fivethirtyeight.com/features/what-the-first-few-post-ukraine-polls-say-about-impeachment/