See https://www.economist.com/sites/default/files/imagecache/640-width/images/print-edition/20190525_USC955.png
Historically presidential approval ratings were strongly correlated with the economy, but under Obama/Trump that relationship broke down. They suggest that it might be because partisans change their view of the economy based on which party holds the presidency. I wonder
(1) If partisans always changed their view based on who's in office. But now there are more partisans (2) How sensitive are the results to the wording of the question