What past impeachments tell us about Trump’s 2020 prospects

History signals that the public’s final verdict on President Donald Trump’s possible impeachment won’t be delivered until the 2020 election — whatever happens next in the House and Senate, and however Americans react to it. …

“The whole impeachment debate has intensified preexisting feelings about the President,” says Republican pollster Whit Ayres. “Most people who like him do so with their eyes wide open. … They understand his strengths and his weaknesses and they prefer him to the alternatives as they see it. On the other hand, people who dislike him will be even more appalled because what they are seeing reinforces their existing views.”

The risk for Trump in that dynamic is that a majority of 51 to 55% of Americans have consistently said they disapprove of his performance, while only around 40 to 45% have usually said they approve. Even if Americans remain closely split on whether Congress should impeach and remove Trump from office, the scandal may be solidifying a division of attitudes that forces him to find a path to reelection without support from anything close to a majority of the electorate. CONT.

Ronald Brownstein, CNN