Indeed, take an examination of the battleground states that Democrats almost certainly need to make inroads into in 2020. The New York Times and Siena College, 2018's most accurate pollster, took a poll of voters in Pennsylvania, Michigan, Florida, North Carolina, Wisconsin and Arizona. These were closest states in the country that cast their electoral votes for Trump in 2016.
Just 43% of voters in these six states want to impeach and remove from office at this point. The majority, 53%, do not. This means that the margin for not impeaching and removing Trump in these states (+10 points) is running well ahead of Trump's margin in these states of about 1.5 points. Put another way, impeaching and removing Trump from office in these states is not a popular position.
Consider this: The longer this impeachment drive goes on, the more angry people are going to get. It is not inconceivable that the more cautious Democrats, who didn't want to start this drama in the first place, may have been right; impeaching Trump could very well be their electoral undoing in 2020.