Miss Mitchell writes those speeches.
4 seconds sound clip from the Meet John Doe (1941) movie soundboard.
You can hear this line at 01:31:28 in the DVD version of the movie.
Quote context
[...]
- And a labor leader like Bennett. And lots of other big shots that are up at D.B.'s house right now.
- Waiting to cut up the John Does.
- Wait till you get a gander at the speech you're gonna make tonight.
- Miss Mitchell writes those speeches.
- Nobody can make her write that kind of stuff.
- Who do you think writes 'em, my aunt Emma?
- I know she writes them and gets a big bonus for doing them, too. A mink coat and diamond bracelet.
[...]