Merkel has been chancellor for 16 years, and has maintained a longer track record for popularity than any US or UK leader I can remember. She also announced in October 2018 that she wasn’t going to seek a fifth term as Chancellor in the 2021 elections, after which the CDU opinion polls moved very little for 18 months before first going up to 40% for about a year and then going down to 20% now.

https://en.wikipedia.org/wiki/Opinion_polling_for_the_2021_G...