Ron Brownstein: “The latest such evidence comes in a new study released today by Navigator Research… The report examines a group that many analysts in both parties believe could prove to be the key bloc of 2020 swing voters: Americans who say they approve of Trump’s management of the economy but still disapprove of his overall performance as president. And it shows Trump facing significant headwinds among that potentially critical group, partly because of the divisive language and behavior he’s taken to new heights, or lows.”

“This conflicted group looms so large over 2020 because about half (or even slightly more) of voters express support for Trump’s management of the economy, but only 40 to 45 percent of them give him positive marks on his overall performance. That difference could be the tipping point between a coalition that places Trump close to the comfort zone for presidents seeking reelection—support from about half of Americans—and one that leaves him trying to secure a second term with positive marks from a much smaller circle. The only presidents since 1952 who sought reelection with approval ratings below 50 percent—Gerald Ford, Jimmy Carter, and George H. W. Bush—all lost.”