Generic polling in regards to Democrat v. Republican for 2024 must be looking pretty bad.
Here is another article on his retirement,
https://au.news.yahoo.com/oregon-rep-earl-blumenauer-retire-001808881.html
Generic ballot polling is mostly a lagging indicator. Incumbent retirements and the pace and quality of candidate recruitment tells how insiders with skin in the game read the next election. For the Dems, the signs are not good, with the GOP House caucus picking an excellent Speaker and many Democratic and Biden policies exposed as shambolic failures. And who wants to be on a party ballot headed by a shuffling, senile crook?