The slides for the recent talk by Keith and Ellen Wolcott on letters to the editor and framing is at: Your Words Can Change the World slides. The handout we gave at the talks is at: Summary Handout.
Here is a useful link for writing letters to the editor: how to write a letter to the editor.
If you live in Coles County, use this link to submit a letter to the Journal Gazette-Times Courier, https://jg-tc.com/forms/contact/letter_to_the_editor/. 300 word limit. One per 3 weeks.
The News Gazette, Champaign, IL (Champaign is not in the 15th district, but some of its reader are). https://www.news-gazette.com/site/forms/online_services/letter_editor/. 250 word limit. One per month. They do not publish letters published elsewhere (so send here first). They will phone you to check that you sent the letter.