Loved the paper. Would like to try to reproduce it with intelectual political leadership soon.
Politicians have speechwriters, though, so you wouldn't be analyzing who you think you're analyzing.
The US has some candidates for your research
Eg
https://youtu.be/6ing_Ibuw6s?si=hJXXkAoMArNinfgT
https://youtube.com/shorts/eZLku9hJPR8?si=d54L6OWWBnkLvz9-
alt Hacker News
Politicians have speechwriters, though, so you wouldn't be analyzing who you think you're analyzing.